- Thābit wa al-mutaḥawwil, Al- (work by Adonis)
Arabic literature: The 20th century and beyond: …form of the four-volume study Al-Thābit wa al-mutaḥawwil (1974–78; “The Static and the Dynamic”), in which he surveys the entire Arabic literary tradition and concludes that, like the literary works themselves, attitudes to and analyses of them must be subject to a continuing process of reevaluation. Yet what he actually…
- Thach weave (air formation)
air warfare: Air superiority: …a system called the “Thach weave,” whereby two fighters would cover one another from attack from the rear. This proved highly successful against the Japanese.
- Thaçi, Hashim (president of Kosovo)
Hashim Thaçi is a Kosovar rebel leader and politician who served as the prime minister (2008–14) and president (2016–20) of Kosovo. Just weeks after assuming the premiership, he oversaw Kosovo’s declaration of independence from Serbia. Thaçi was born in the Drenica valley, west of Pristina in
- Thack, Edward (English pirate)
Blackbeard was one of history’s most famous pirates, who became an imposing figure in American folklore. Little is known of Blackbeard’s early life, and his origins have been left to speculation. He has been widely identified as Edward Teach (or several variations thereof, including Thatch and
- Thacker, Charles P. (American computer scientist)
Charles P. Thacker was an American winner of the 2009 A.M. Turing Award, the highest honour in computer science, for his “pioneering design and realization of the first modern personal computer.” Thacker received a bachelor’s degree in physics from the University of California, Berkeley, in 1967.
- Thackeray, Bal (Indian journalist and politician)
Bal Thackeray was an Indian journalist and politician, founder of the Shiv Sena (“Army of Shiva”) political party, and advocate of a strong pro-Hindu policy in India. Under his leadership the Shiv Sena became a dominant political force in the western Indian state of Maharashtra. Thackeray began his
- Thackeray, Balasaheb Keshav (Indian journalist and politician)
Bal Thackeray was an Indian journalist and politician, founder of the Shiv Sena (“Army of Shiva”) political party, and advocate of a strong pro-Hindu policy in India. Under his leadership the Shiv Sena became a dominant political force in the western Indian state of Maharashtra. Thackeray began his
- Thackeray, Raj (Indian politician)
Bal Thackeray: His nephew Raj Thackeray—who was responsible for compiling Bal Keshav Thackeray: A Photobiography (2005), which commemorates his uncle’s career—had been mentioned as a possibility. However, Bal’s son Uddhav was the eventual successor, having assumed the post of executive president of the Shiv Sena in 2004. Raj Thackeray…
- Thackeray, Uddhav (Indian politician)
Bal Thackeray: However, Bal’s son Uddhav was the eventual successor, having assumed the post of executive president of the Shiv Sena in 2004. Raj Thackeray subsequently left the party and in 2006 formed the rival Maharashtra Navnirman Sena (“Maharashtra Reconstruction Army”) party. Uddhav continued to lead the party and in…
- Thackeray, William Makepeace (British author)
William Makepeace Thackeray was an English novelist whose reputation rests chiefly on Vanity Fair (1847–48), a novel of the Napoleonic period in England, and The History of Henry Esmond, Esq. (1852), set in the early 18th century. Thackeray was the only son of Richmond Thackeray, an administrator
- Thaddaeus (Apostle)
St. Jude ; Western feast day October 28, Eastern feast days June 19 and August 21) was one of the original Twelve Apostles of Jesus. He is the reputed author of the canonical Letter of Jude that warns against the licentious and blasphemous heretics. The Roman Catholic devotion to him as patron
- Thaden, Louise McPhetridge (American aviator)
Louise McPhetridge Thaden was an American aviator, holder of several speed and endurance records in the early years of competitive flying. Possibly the best-known female pilot of the 1930s after Amelia Earhart, she used her fame as a competitor to promote the status of women in aviation and to draw
- Thadentsonyane (mountain, Lesotho)
Thabana Ntlenyana, mountain peak (11,424 feet [3,482 metres]) in the Drakensberg and the highest in Africa south of Kilimanjaro. The peak lies in Lesotho, an independent country entirely within South Africa, just west of the border with the province of KwaZulu-Natal. Nearby are the headwaters of
- Thaer, Albrecht von (German agronomist)
feed: …1809 by the German agriculturist Albrecht von Thaer, who developed “hay values” as measures of the nutritive value of feeds. Tables of the value of feeds and of the requirements of animals in Germany followed and were later used in other countries.
- ṭhag (Indian bandit)
thug, member of a well-organized confederacy of professional assassins who traveled in gangs throughout India for several hundred years. (The earliest authenticated mention of the thugs is found in Ẓiyāʾ-ud-Dīn Baranī, History of Fīrūz Shāh, dated about 1356.) The thugs would insinuate themselves
- ṭhagī (Indian bandit)
thug, member of a well-organized confederacy of professional assassins who traveled in gangs throughout India for several hundred years. (The earliest authenticated mention of the thugs is found in Ẓiyāʾ-ud-Dīn Baranī, History of Fīrūz Shāh, dated about 1356.) The thugs would insinuate themselves
- thags (Indian bandit)
thug, member of a well-organized confederacy of professional assassins who traveled in gangs throughout India for several hundred years. (The earliest authenticated mention of the thugs is found in Ẓiyāʾ-ud-Dīn Baranī, History of Fīrūz Shāh, dated about 1356.) The thugs would insinuate themselves
- Thagya Min (Burmese spirit)
Buddhism: Local gods and demons: …local nats is headed by Thagya Min. Identified with Indra, he becomes a divine protector of Buddhism, who reigns in the Heaven of the Thirty-three Gods.
- Thai (people)
Buddhism: From Myanmar to the Mekong delta: …spread to Thailand, where the Thai were gradually displacing the Mon as the dominant population. During the next two centuries, Theravada reforms penetrated as far as Cambodia and Laos.
- Thai alphabet (writing)
Tai languages: Writing: The Modern Thai alphabet (see Thai alphabetThai alphabet.table) is a modified form of the original writing. It preserves the old distinction of voiced (low), voiceless aspirate (high), and voiceless
- Thai basil (herb)
basil: Species: Thai basil (O. basilicum, variety thyrsiflora) and the related holy basil (O. tenuiflorum) and lemon basil (O. ×citriodorum) are common in Asian cuisine. The dried large-leaf varieties have a fragrant aroma faintly reminiscent of anise and a warm, sweet, aromatic, mildly pungent flavor. The dried…
- Thai Binh (Vietnam)
Thai Binh, city, northeastern Vietnam. Thai Binh is a market centre on the Tra Ly River and is connected by road with Hanoi, 53 miles (85 km) northwest. The surrounding region is a densely populated and intensely cultivated low delta. It is one of the country’s granaries; two rice crops a year can
- Thai boxing (sports)
boxing: Asia: …the traditional martial art of Thai boxing (Muay Thai) are both featured at many boxing events. This fusion has its roots in the 1930s, when Queensberry boxing first reached Thailand and began influencing the native sport. Soon Muay Thai matches were held in a ring and fought under time limitations.…
- Thai language
Thai language, the standard spoken and literary language of Thailand, belonging to the Tai language family of Southeast Asia. It is based largely on the dialect of Bangkok and its environs in the central region of the country but retains certain consonant distinctions (such as l versus r, kl versus
- Thai literature
Thai literature, body of writings of the Thai (Siamese) people, historically fostered by the kings, who themselves often produced outstanding literary works. The earliest literature, that of the Sukhothai period (13th to mid-14th century), survives chiefly in stone inscriptions, which provide vivid
- Thai Nguyen (Vietnam)
Thai Nguyen, city, northern Vietnam. The city is located on the right bank of the Cau River, which flows southeastward into the Gulf of Tonkin. It is connected with Haiphong by river steamers and with Hanoi by road. The population includes a high proportion of Tai. Iron ore deposits are located
- Thai Rak Thai (political party, Thailand)
Thailand: Thaksin Shinawatra: …held in January 2001 the Thai Rak Thai (TRT; “Thais Love Thais”) party, created in 1995, became dominant, and its founding leader, Thaksin Shinawatra, moved to the centre of Thai politics. Thaksin exemplified the new politician of the post-1992 period. A Sino-Thai from Chiang Mai in the north, he cultivated…
- Thai Ton (Vietnamese ruler)
Hien Vuong was a member of the Nguyen family who ruled in southern Vietnam in 1648–87. He persecuted European Christian missionaries, expanded the territory under his control, and made notable agricultural reforms. Hien Vuong launched campaigns in 1655–61 designed to defeat the Trinh rulers in
- Thai Tyson, the (Thai boxer)
Khaosai Galaxy is a Thai professional boxer, world junior bantamweight (115 pounds) champion from 1984 to 1991. Galaxy is considered Thailand’s greatest boxer. (Read Gene Tunney’s 1929 Britannica essay on boxing.) Galaxy began his professional boxing career in 1980. He defeated Eusebio Espinal of
- Thai-Lao Friendship Bridge (bridge, Thailand)
Nong Khai: In 1994 the Thai-Lao Friendship Bridge, the first bridge across the lower reaches of the Mekong River, was opened; it links Nong Khai by road with Vientiane. Nong Khai is the northern terminus of a railway from Bangkok and lies on the Bangkok-Vientiane highway. Pop. (2000) 59,776.
- thaikthugyi (Myanmar official)
thugyi: The thaikthugyi, similar to the myothugyi in duties and privileges, operated in areas where the population was more alien (athi) and imperfectly assimilated. A thaikthugyi could acquire genuine authority locally through election by the villages and authentication by the Hlutdaw. In addition to other duties, a…
- Thailand
Thailand, country located in the centre of mainland Southeast Asia. Located wholly within the tropics, Thailand encompasses diverse ecosystems, including the hilly forested areas of the northern frontier, the fertile rice fields of the central plains, the broad plateau of the northeast, and the
- Thailand, Bank of (bank, Thailand)
Thailand: Finance: The Bank of Thailand, established in 1942, issues the baht, acts as central banker to the government and to the commercial banks, and serves as the country’s financial agent in dealing with international financial markets, international monetary organizations, and other central banks. Together with the Ministry…
- Thailand, flag of
national flag consisting of horizontal stripes of red, white, blue, white, and red. The flag has a width-to-length ratio of 2 to 3.The original national flag of Thailand, in use from perhaps the 17th century, was plain red. When other states in the area displayed similar flags and commerce
- Thailand, Gulf of (inlet, South China Sea)
Gulf of Thailand, inlet of the South China Sea bordering Thailand (southwest through north), Cambodia, and southern Vietnam (northeast). The Gulf of Thailand is 300 to 350 miles (500 to 560 km) wide and 450 miles (725 km) long. The Chao Phraya and Nakhon Chai Si rivers enter the gulf near its head.
- Thailand, history of
history of Thailand, a survey of notable events and people in the history of Thailand. Located in the centre of mainland Southeast Asia, Thailand consists of two broad geographic areas: a larger, main section in the north and a smaller, peninsular extension in the south. Siam, as Thailand was
- Thailand-Cambodia Conflict (territorial dispute [2025])
On July 24, 2025, heavy fighting broke out along the Thailand-Cambodia border, the most intense in over a decade. The Thailand-Cambodia conflict emerged from a long-running dispute over ownership of ancient temples and their surrounding land, particularly the temples of Preah Vihear and Ta Muen
- Thaipusam (Hindu festival)
Batu Caves: Thaipusam, the Tamil Hindu festival devoted to Murugan, was first celebrated on the site in 1892 and is now a major event that attracts hundreds of thousands of pilgrims annually.
- Thais (Christian saint)
Thais: …Roman comedy were often named Thais. There is also a Christian saint called Thais, a reformed prostitute, but her story is probably fictitious; it was used by Anatole France for his Thaïs (1890) and thence for Jules Massenet’s opera of the same name (1894).
- Thaïs (work by France)
Thais: …by Anatole France for his Thaïs (1890) and thence for Jules Massenet’s opera of the same name (1894).
- Thaïs (opera by Massenet)
Thais: …and thence for Jules Massenet’s opera of the same name (1894).
- Thais (Greek courtesan)
Thais was an Athenian courtesan who traveled with the army of Alexander the Great in its invasion of Persia. She is chiefly known from the story that represents her as having persuaded Alexander to set fire to the Achaemenian capital of Persepolis in the course of a drunken revel. The authenticity
- Thaisa (fictional character)
Pericles: …the hand of the beautiful Thaisa, daughter of King Simonides. As the couple sail back to Tyre, Thaisa gives birth to Marina during a violent storm. Pericles, believing his wife has died in childbirth, buries her at sea, but she is rescued and joins the temple of the goddess Diana…
- Thakin movement (Myanmar politics)
Myanmar: The emergence of nationalism: …to be known as the Thakin movement. The name for this movement was purposely ironic: the Burmese word thakin (“master”) was the term that the Burmese were required to use when addressing the British.
- Thakin Nu (prime minister of Myanmar)
U Nu was a Burmese independence leader and prime minister of Myanmar (formerly Burma) from 1948 to 1958 and from 1960 to 1962. U Nu was educated at the University of Rangoon (Yangon), from which he received his B.A. degree in 1929. For some years headmaster of the National High School in Pantanaw,
- Ṭhākur, Debendranāth (Hindu philosopher)
Debendranath Tagore was a Hindu philosopher and religious reformer, active in the Brahmo Samaj (“Society of Brahma,” also translated as “Society of God”). Born into a wealthy landowning family, Tagore began his formal education at the age of nine; he was taught Sanskrit, Persian, English, and
- Ṭhākur, Rabīndranāth (Bengali poet)
Rabindranath Tagore was a Bengali poet, short-story writer, song composer, playwright, essayist, and painter who introduced new prose and verse forms and the use of colloquial language into Bengali literature, thereby freeing it from traditional models based on classical Sanskrit. He was highly
- Thal (region, Pakistan)
Thal, central section of the Sindh Sāgar Doāb (tract), Punjab province, Pakistan, lying between the Indus and the Jhelum and Chenāb rivers. Formerly desert, it is now irrigated by canals from the Jinnah Barrage (Kālābāgh Barrage) on the Indus. The Thal Project, under the Agriculture Development
- Thala (Tunisia)
World War II: Tunisia, November 1942–May 1943: … but northward from Kasserine against Thala—where, in fact, Alexander was expecting him. Having overcome the stubborn U.S. resistance in the Kasserine Pass on February 20, the Germans entered Thala the next day, only to be expelled a few hours later by Alexander’s reserve troops. His chance having been forfeited, Rommel…
- Thalaivar (Indian actor)
Rajinikanth is an Indian actor whose unique mannerisms and stylized line delivery made him one of the leading stars of Tamil cinema. With roles in 170 films, he also enjoyed considerable success in Hindi, Telugu, and Kannada movies. Known for his charismatic screen presence and the extreme
- thalami (anatomy)
thalamus, either of a pair of large ovoid organs that form most of the lateral walls of the third ventricle of the brain. The thalamus translates neural impulses from various receptors to the cerebral cortex. While the thalamus is classically known for its roles as a sensory relay in visual,
- thalamos (architecture)
Aegean civilizations: The Shaft Grave Period on the mainland (c. 1600–1450): …vaulted or corbeled roof, the thalamos. When the facades are finely dressed with cut stones or recessed vertical panels, one may think of a Cretan connection; indeed, one of the tholos tombs at Peristeria has two Cretan “masons’ marks,” a branch and a double ax, cut into the facade to…
- thalamus (anatomy)
thalamus, either of a pair of large ovoid organs that form most of the lateral walls of the third ventricle of the brain. The thalamus translates neural impulses from various receptors to the cerebral cortex. While the thalamus is classically known for its roles as a sensory relay in visual,
- Thalapathi (film by Ratnam [1991])
Mammootty: 1990s: … in the hit crime thriller Thalapathi (1991; “Commander”), directed by Mani Ratnam. His performance as B.R. Ambedkar, architect of the Indian Constitution, in the film Dr. Babasaheb Ambedkar (2000), earned him another National Film Award for best actor.
- Thalarctos maritimus (mammal)
polar bear, (Ursus maritimus), great white northern bear (family Ursidae) found throughout the Arctic region. The polar bear travels long distances over vast desolate expanses, generally on drifting oceanic ice floes, searching for seals, its primary prey. The polar bear is the largest and most
- Thalassa: A Theory of Genitality (work by Ferenczi)
Sándor Ferenczi: In Thalassa: A Theory of Genitality (1924), he suggested that the wish to return to the womb and the comfort of its amniotic fluids symbolizes a wish to return to the origin of life, the sea.
- Thalassarche melanophris (bird)
albatross: The black-browed albatross (Thalassarche melanophris), with a wingspread to about 230 cm (7.5 feet), wanders far offshore in the North Atlantic. A dark eye-streak gives it a frowning appearance.
- thalassemia (pathology)
thalassemia, group of blood disorders characterized by a deficiency of hemoglobin, the blood protein that transports oxygen to the tissues. Thalassemia (Greek: “sea blood”) is so called because it was first discovered among peoples around the Mediterranean Sea, among whom its incidence is high.
- thalassemia major (pathology)
blood disease: Thalassemia and hemoglobinopathies: Thalassemia major (Cooley anemia) is characterized by severe anemia, enlargement of the spleen, and body deformities associated with expansion of the bone marrow. The latter presumably represents a response to the need for greatly accelerated red cell production by genetically defective red cell precursors, which…
- thalassemia minor (pathology)
blood disease: Thalassemia and hemoglobinopathies: …mild form of the disease, thalassemia minor, there is usually only slight or no anemia, and life expectancy is normal. Thalassemia major (Cooley anemia) is characterized by severe anemia, enlargement of the spleen, and body deformities associated with expansion of the bone marrow. The latter presumably represents a response to…
- Thalassery (India)
Thalassery, town and port, northern Kerala state, southwestern India. It is situated on the Malabar Coast of the Arabian Sea. The town was established in 1683 by the British for the pepper and cardamom trade, and it was their first settlement on the Malabar Coast. A fort was built there in 1708 and
- Thalassia (plant)
Hydrocharitaceae: Turtle grass (Thalassia species) is often washed ashore in such quantities following storms at sea that it is collected and used as a fertilizer. Hydrilla verticillata, the sole member of its genus, is a troublesome aquatic weed in many places.
- Thalassina (crustacean)
crustacean: Importance to humans: …and by the mud-eating, shrimplike Thalassina of Malaya. By undermining paddy embankments, they allow water to drain away, thus exposing the roots of the plants to the sun; if near the coast, salt water may thus be allowed to seep into the paddies. Tadpole shrimps (Triops) are often numerous in…
- Thalassiosira (algae genus)
algae: Annotated classification: diatomite deposits; includes Cyclotella and Thalassiosira (centrics) and Bacillaria, Navicula and Nitzschia (pennates). Class Bicosoecaceae May be included in the Chrysophyceae or in the protozoan group Zoomastigophora; colourless flagellate cells in vase-shaped
- Thalassoica antarctica (bird)
Antarctica: Birds: but only three—the emperor penguin, Antarctic petrel, and South Polar (McCormick’s) skua—breed exclusively on the continent or on nearby islands. An absence of mammalian land predators and the rich offshore food supply make Antarctic coasts a haven for immense seabird rookeries. Penguins, of the order Sphenisciformes, symbolize this polar region,…
- Thalassoma (genus of fish)
marine ecosystem: Distribution and dispersal: …example, wrasses of the genus Thalassoma have a long larval life, compared with many other types of reef fish, and populations of these fish are well dispersed to the reefs of isolated volcanic islands around the Pacific. The bipartite life cycle of algae also affects their dispersal, which occurs through…
- Thalassoma bifasciatum (fish)
wrasse: …such as young blueheads (Thalassoma bifasciatum) and Labroides species, act as cleaners for larger fishes. They pick off and eat the external parasites of groupers, eels, snappers, and other fishes that visit them periodically. This cleaning service is also performed by various other small fishes and by certain shrimps.
- Thalassoma lunare (fish)
wrasse: …7 kg (15 pounds); the moon wrasse (Thalassoma lunare), an Indo-Pacific species, green, red, and purplish in colour; the cuckoo wrasse (Labrus ossiphagus), an eastern Atlantic and Mediterranean species that is blue and orange if male, orange or reddish if female; and the tautog, or blackfish, a common western Atlantic…
- Thalassophryne (fish)
toadfish: …North America; venomous toadfishes (Thalassophryne and Daector), found in Central and South America and notable for inflicting painful wounds with the hollow, venom-injecting spines on their dorsal fins and gill covers; and midshipmen (Porichthys), shallow-water American fishes named for numerous (600–840) small, buttonlike light organs arranged in rows along…
- Thalassophryninae (fish)
toadfish: …waters along eastern North America; venomous toadfishes (Thalassophryne and Daector), found in Central and South America and notable for inflicting painful wounds with the hollow, venom-injecting spines on their dorsal fins and gill covers; and midshipmen (Porichthys), shallow-water American fishes named for numerous (600–840) small, buttonlike light organs arranged in…
- thalassotherapy (therapeutics)
Granville: …fishing port and has a thalassotherapy (medicinal use of sea water and sea products) centre. Of the town’s various small industries, food processing is the most important. Pop. (1999) 12,687; (2014 est.) 13,350.
- Thalberg, Irving (American motion-picture executive)
Irving Thalberg was an American film executive called the “boy wonder of Hollywood” who, as the production manager of MGM, was largely responsible for that studio’s prestigious reputation. Born of German immigrant parents, Thalberg suffered from a weak heart and was plagued with health problems all
- Thalberg, Irving Grant (American motion-picture executive)
Irving Thalberg was an American film executive called the “boy wonder of Hollywood” who, as the production manager of MGM, was largely responsible for that studio’s prestigious reputation. Born of German immigrant parents, Thalberg suffered from a weak heart and was plagued with health problems all
- Thalberg, Sigismond (Swiss pianist)
Sigismond Thalberg was the leading rival of Franz Liszt as a virtuoso pianist. Thalberg began performing at the age of 14 in Viennese salons. In 1830 he toured Germany and England, and in 1834 he assumed the post of court pianist in Vienna. In 1836 he moved to Paris, where a famous rivalry
- Thale Luang (lagoon, Gulf of Thailand)
Luang Lake, coastal lake or lagoon (thale), southern Thailand, on the east coast of the Malay Peninsula. The lake, 50 miles (80 km) long and up to 15 miles (24 km) wide, is dotted with islands. It is a fertile fishing ground and is connected to the Gulf of Thailand at Songkhla town on its southern
- Thaleichthys pacificus (fish)
candlefish, species of smelt of the genus Thaleichthys
- Thalén, Robert (Swedish physicist)
Anders Jonas Ångström: He and his collaborator Robert Thalén measured the spectral lines of many chemical elements, both in the solar spectrum and in the laboratory. Ångström and Thalén’s work soon became authoritative. However, Ångström suspected that their work contained a systematic error, and it was not until 1884, 10 years after…
- thaler (coin)
Jáchymov: …German monetary unit taler, or thaler, from which the English word dollar is derived, refers to the Joachimsthaler, a coin first minted in Jáchymov in 1517.
- Thaler, Richard (American economist)
Richard Thaler is an American economist who was awarded the 2017 Nobel Prize for Economics for his contributions to behavioral economics, a field of microeconomics that applies the findings of psychology and other social sciences to the study of economic behaviour. In published work spanning more
- Thales of Miletus (Greek philosopher)
Thales of Miletus was a philosopher renowned as one of the legendary Seven Wise Men, or Sophoi, of antiquity. He is remembered primarily for his cosmology based on water as the essence of all matter, with Earth a flat disk floating on a vast sea. The Greek historian Diogenes Laërtius, quoting
- Thales’ rectangle
Thales of Miletus flourished about 600 bce and is credited with many of the earliest known geometric proofs. In particular, he has been credited with proving the following five theorems: (1) a circle is bisected by any diameter; (2) the base angles of an isosceles triangle are equal; (3) the
- Thales’ rectangle (geometry)
Thales’ rectangle: Thales of Miletus flourished about 600 bce and is credited with many of the earliest known geometric proofs. In particular, he has been credited with proving the following five theorems: (1) a circle is bisected by any diameter; (2) the base angles of an isosceles…
- Thalia (work by Arius)
Arius: …verse of his major work, Thalia (“Banquet”), and was widely spread by popular songs written for laborers and travelers.
- Thalia (Greek mythology)
Thalia, in Greek religion, one of the nine Muses, patron of comedy; also, according to the Greek poet Hesiod, a Grace (one of a group of goddesses of fertility). She is the mother of the Corybantes, celebrants of the Great Mother of the Gods, Cybele, the father being Apollo, a god related to music
- Thalia-Theater (theater, Hamburg, Germany)
Hamburg: Cultural life: The Thalia-Theater, founded in 1843, with a multifaceted program that includes plenty of light entertainment, is popular with local audiences. All three establishments are generously funded by the state. The numerous other theatres include the tiny Piccolo-Theater and the Hansa-Theater, said to be the last genuine…
- Thaliacea (tunicate class)
tunicate: Annotated classification: Class Thaliacea Pelagic forms; atrial aperture directed toward the rear of each zooid; asexual buds form from a ventral stolon; about 70 species. Order Pyrosomida Zooids embedded in a tube open at one end. Order Doliolida Complex alternation of generations between a
- Thalictrum (plant)
meadow rue, (genus Thalictrum), genus of approximately 330 species of perennial herbaceous plants in the buttercup family (Ranunculaceae). They occur in the North Temperate Zone and in South America and Africa, in wooded as well as in sunny, open areas. The plants’ compound leaves consist of three
- thalidomide (medical compound)
thalidomide, compound in medicine initially used as a sedative and an antiemetic until the discovery that it caused severe fetal malformations. Thalidomide was developed in West Germany in the mid-1950s and was found to induce drowsiness and sleep. The drug appeared to be unusually safe, with few
- Thalle Pass (mountain pass, Asia)
Hindu Kush: Study and exploration: … passed northward, or the adjacent Thalle Pass, used by Timur; the second was the Kushān Pass (slightly to the west of the present-day Sālang road tunnel), which Alexander crossed southward; and the third was the Kipchak Pass, used by Genghis Khan in the early 13th century and by Bābur in…
- thalli (biology)
thallus, plant body of algae, fungi, and other lower organisms formerly assigned to the obsolete group Thallophyta. A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex treelike form. It has a simple structure that lacks specialized
- thallium (chemical element)
thallium (Tl), chemical element, metal of main Group 13 (IIIa, or boron group) of the periodic table, poisonous and of limited commercial value. Like lead, thallium is a soft, low-melting element of low tensile strength. Freshly cut thallium has a metallic lustre that dulls to bluish gray upon
- Thallophyta (plant)
Stephan Endlicher: …divided the plant kingdom into thallophytes (including the algae, fungi, and lichens) and cormophytes (including the mosses, ferns, and seed plants), remained a valuable descriptive index to plant families and genera for more than a half century.
- thallophyte (plant)
Stephan Endlicher: …divided the plant kingdom into thallophytes (including the algae, fungi, and lichens) and cormophytes (including the mosses, ferns, and seed plants), remained a valuable descriptive index to plant families and genera for more than a half century.
- thallose liverwort (plant)
plant: Division Marchantiophyta: Thalloid (thallose) liverworts have a ribbonlike, or strap-shaped, body that grows flat on the ground. They have a high degree of internal structural differentiation into photosynthetic and storage zones. Liverwort gametophytes have unicellular rhizoids. Liverworts have an alternation of generations similar to that of mosses, and,…
- thallus (biology)
thallus, plant body of algae, fungi, and other lower organisms formerly assigned to the obsolete group Thallophyta. A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex treelike form. It has a simple structure that lacks specialized
- Thälmann, Ernst (German politician)
Ernst Thälmann was a German Communist leader and twice presidential candidate during the Weimar Republic (1919–33), who was chiefly responsible for molding the German Communist Party (KPD; Kommunistische Partei Deutschlands), the most powerful communist party outside the Soviet Union. Thälmann, a
- Thalun (king of Burma)
Myanmar: The Toungoo dynasty, 1531–1752: Anaukpetlun’s successor, Thalun, reestablished the principles of the Myanmar state created half a millennium earlier at Pagan. Heavy religious expenditures, however, weakened Ava politically, much as they had done in Pagan. In the meantime, southern Myanmar had been rejuvenated by the new commercial activity spurred by the…
- Thalysia (idyll by Theocritus)
Theocritus: …the sea nymph Galatea; and Thalysia (“Harvest Home,” Idyll 7), describing a festival on the island of Cos. In this the poet speaks in the first person and introduces contemporary friends and rivals in the guise of rustics.
- Thalysia (Greek festival)
Demeter: (4) Thalysia, a thanksgiving festival held in autumn after the harvest in the island of Cos. (5) The Thesmophoria, a women’s festival meant to improve the fruitfulness of the seed grain. (6) The Skirophoria held in midsummer, a companion festival.
- Tham Khuyen Cave (cave, Vietnam)
primate: Pleistocene: In one such cave (Tham Khuyen), Gigantopithecus and Homo teeth occur in the same deposits, dated as recently as 475,000 years ago. Furthermore, the discovery of an enormous jaw in the Dhok Pathan deposits of the Siwālik Hills of India, from the earliest Pliocene, has provided a respectably long…