- P ... P.S.1 Contemporary Art Center
- P.V. Sindhu ... Pace, Harry
- Pace, Luigi da ... Pacific languages
- Pacific League ... packed red blood cell
- packed scrubber ... Padre Island
- Padre Island National Seashore ... Page, Sir Frederick Handley
- Page, Stanton ... Paiement, André
- PAIGC ... paired-associate learning
- pairing energy ... Pakokku
- Pakomova, Lyudmila ... Palaeozoic Era
- Palaestina Salutaris ... Pale King, The
- pale laurel ... Palestine National Covenant
- Palestine Plateau ... Pallavicini, Gian Luca
- Pallavicino, Oberto ... Palmer Archipelago
- Palmer House Hilton Hotel ... Palookaville
- Palóu, Francisco ... PAN
- pan ... Panama hat palm
- Panama hat plant ... pancreatic secretory trypsin inhibitor
- pancreatitis ... panel wall
- panel-block caving ... Panjkora
- Panjnad River ... Panthalops hodgsoni
- Panthay Rebellion ... Paolazzi, Leo
- Paoli, Pasquale ... paper cartridge
- Paper Chase, The ... Pappenheim, Gottfried Heinrich, Count zu
- pappus ... parachuting
- Paraclete ... Paraguay tea
- Paraguay, Congress of ... paralytic shellfish poisoning
- Param Sant Ji Maharaj ... Parapithecidae
- paraplatform ... Parc National de Waza
- Parc National des Garamba ... Pareto-efficiency
- Pareto-optimality ... Paris Marathon
- Paris Match ... Parizeau, Jacques
- Parji language ... Parkhurst, Charley Darkey
- Parkhurst, Helen ... Parnasse françois
- Parnassia ... parrot fever
- parrot fish ... Partabgarh
- Partabgarh ... partial thermoremanent magnetization
- partial thromboplastin time ... Partido Revolucionario Nacional
- Partido Roldosista Ecuatoriano ... Party of Labour of Albania
- party per pale ... Paschen, Elise
- Paschke, Ed ... Passaic River
- Passalidae ... passion-flower family
- Passionate Kisses ... Pastora, Edén
- Pastora, Edén Gómez ... Patch of Blue, A
- patch reef ... Path to Nigerian Freedom
- Path to Prosperity: Restoring America’s Promises ... Pato real
- Patocka, Jan ... Patroclus
- patrol ship ... Pauḍyāl, Lekhnāth
- Pauger, Adrien de ... Paulinus, Saint
- Paulist Fathers ... Pavlovsk
- Pavlovsk ... Payne, Freda
- Payne, Humfry (Gilbert Garth) ... PCR
- PCRM ... peace psychology
- peace research ... Peale, Rembrandt
- Peale, Sarah Miriam ... Peasant Bruegel
- peasant commune ... pectine
- Pectinibranchia ... pedodontics
- pedogenesis ... peewee
- PEG ... Pekah
- Pekalongan ... Pelevin, Viktor
- Pelevin, Viktor Olegovich ... Pelotas
- Pelotas River ... penal colony
- Penal Laws ... Peng-pu
- Pengar ... Pennantiaceae
- Pennar River ... Penrose diagram
- Penrose pattern ... Penthièvre, Louis Joseph, Duc de
- Penthoraceae ... People’s Daily World
- People’s Democratic Party ... Pepi II
- Pépin d’Héristal ... per- and polyfluoroalkyl substance
- Per-Amon ... Percy
- Percy Family ... Perestroika in Paris
- Peresvetov, Ivan Semenovich ... performance-enhancing drug
- performatism ... Peril of Sziget, The
- perilla oil ... Peristephanon
- peristerite ... permeability
- permeability coefficient ... Perpetuities and Accumulations Act 2009
- perpetuity ... Persephone
- Persephone, sanctuary of ... personal data assistant
- personal digital assistant ... Pertusariales
- pertussis ... Pessac
- Pessagno, Emmanuele ... Peter I
- Peter I ... Peters, Curtis Arnoux
- Peters, Ellis ... PETN
- Peto Sjarif ... petroleum geology
- petroleum industry ... petticoat breeches
- petticoat fish ... PF resin
- Pfaff, Johann Friedrich ... phaeton
- Phaeton ... phantasy
- Phantasy for Violin and Piano ... phase velocity
- phase-contrast microscope ... phenolsulfonphthalein test
- Phenomena and Perception B ... Philadelphia Zoological Gardens
- Philadelphia, Academy of ... Philip IV
- Philip IV ... Philippine tarsier
- Philippine Trade Act ... Philodendron bipenniflorium
- Philodendron bipinnatifidum ... Philostorgius
- Philostratus the Lemnian ... Phocas, Leo
- Phocidae ... Pholidichthyidae
- pholidophorid ... phosphomannomutase 2
- phosphomannose isomerase deficiency ... photoemission
- photoengraving ... phototube
- phototypesetting ... phur-bu
- Phurba Tashi Sherpa ... Physcomitrium turbinatum
- Physcon ... Physostigma venenosum
- physostigmine ... Piano Sonata
- Piano Sonata ... Piccolomini, Francesco Todeschini
- Piccolomini-Pieri, Ottavio, duca d’Amalfi ... Pico da Neblina
- Pico de Orizaba, Volcán ... pie
- pie and mash ... Pieridae
- Pierinae ... Pietrobuono, Gasparino di
- Pietrosu ... Pik Pobedy
- Pik Revolyutsii ... Pilgrims of Mecca, The
- Pilgrims of Mecca, The ... Piltur og stúlka
- Pilularia ... Pinckney, Clementa
- Pinckney, Eliza ... ping
- ping pong ... pinning
- pinniped ... pinyon pine
- Pinza, Ezio ... Pipistrellus hesperus
- Pipistrellus pipistrellus ... piriformis syndrome
- Pirin Mountains ... Piss Christ
- pissaladiera ... pitcher plant
- Pitcher, C. ... Pitts, Walter
- Pitts, Zasu ... Pizarro, Gonzalo
- Pizarro, Guido ... plagiogranite
- Plagiogyria ... planar map
- planar problem ... planned parenthood
- Planned Parenthood Federation of America, Inc. ... Plantin
- Plantin, Christophe ... plasticity
- plasticity index ... platform paddle tennis
- platform reef ... Plavni Nature Reserve
- Plavšić, Biljana ... Please Don’t Eat the Daisies
- Please Don’t Eat the Daisies ... pleopod
- Pleosporales ... Pliekšāns, Jānis
- Pliensbachian Stage ... PLP
- PLP ... Plus Belles Années d’une vie, Les
- plus excellents bastiments de France, Les ... pneumatic caisson
- pneumatic capsule pipeline ... pochard
- Pochen ... Podostemum
- Podostemum ceratophyllum ... Poems of Passion
- Poems of the East and West ... Poggio Bracciolini, Gian Francesco
- Poggio Civitate ... Point Omega
- point paper ... Poitiers
- Poitiers, Battle of ... polar cyclone
- polar desert ... Polemaetus bellicosus
- polemarch ... Polish carpet
- Polish checkers ... political spectrum
- political spin ... Pollicipes pollicipes
- Pollicipes polymerus ... poly-2-hydroxyethyl methacrylate
- poly-4-hydroxybenzoate ... polyene
- polyepiphyseal dysplasia ... polymorphism
- polymorphism ... polysaccharide
- Polyscias fruticosa ... Pomeroon River
- Pomeroy, Herb ... Pond, Arthur
- Pond, Ashley ... Pontiac GTO
- Pontiac’s Conspiracy ... Poolman
- pools ... Popkin, Richard H.
- poplar ... population growth
- Population II ... Porkopolis
- porkpie ... Port Fuad
- Port Gibson ... portable document format
- Portable Faulkner, The ... Portinari Altarpiece
- Portinari Triptych ... Portrait of Jennie
- Portrait of Kossuth ... Porzellan Manufaktur Nymphenburg
- Posada, José Guadalupe ... possibilism
- Possibilité d’une île, La ... Postel, Guillaume
- postencephalitic parkinsonism ... postzygotic RIM
- posy ... potential energy
- potential energy curve ... Pottersville
- Potterton, Gerald ... poverty oat grass
- Poverty of Philosophy, The ... Power Elite, The
- power factor ... Poyedinok
- Poyet, Guillaume ... practical Hinduism
- practical joke ... Prahlada-charitra
- Prahova ... Prasutagus
- Prat, Si ... prazo
- Pražský hrad ... precision skating
- precision-guided warhead ... preform
- preformation theory ... premios, Los
- premise ... Presbytis entellus
- Presbytis frontata ... President, The
- Presidente Costa e Silva Bridge ... Pression barométrique, recherches de physiologie expérimentale, La
- Pressley, Ayanna ... Pretorius, Andries Wilhelmus Jacobus
- Pretorius, Marthinus Wessel ... price controls
- price discrimination ... Pride of the Marines
- Pride of the Yankees, The ... primary clarifier
- primary color ... Prime Minister, The
- prime ministers of Australia, list of ... Prince Albert
- Prince Albert ... Princess Diaries, The
- Princess Diarist, The ... Principles of Psychology, The
- Principles of Quantum Mechanics, The ... Prism
- PRISM ... Private Initiative and Decentralization, League of
- private international law ... Pro Roscio comoedo
- Pro Sulla ... procedure, De
- Procedure, The ... Procynosuchus
- Procyon ... Professional Correctness: Literary Studies and Political Change
- professional cramp ... programming
- programming ... Project GROPE
- Project Gutenberg ... PROMESA
- Promesse, La ... Proof
- proof ... Prophet, The
- Prophète, Un ... prosciutto di Parma
- proscriptio ... protactinium
- protactinium-231 ... proterothere
- Proterozoic Eon ... Protocol I
- Protocol II ... protozoacidal drug
- protozoal disease ... provisional ballot
- provisional equilibrium ... Prunus cerasifera
- Prunus cerasus ... PS3
- PS4 ... pseudo-hypertropic muscular dystrophy
- Pseudo-Isidore, Decretals of ... Pseudotsuga
- Pseudotsuga douglasii ... PSTN
- PSU ... Psychology, Descriptive and Explanatory
- Psychomachia ... Pterocarpus indicus
- Pterocarpus santalinus ... Ptolemy VI Philometor
- Ptolemy VII Neos Philopator ... Public Health Service
- Public Health Service Act ... Puccini, Giacomo Antonio Domenico Michele Secondo Maria
- Puccinia graminis ... Puerto Hormiga
- Puerto La Cruz ... Pukaskwa National Park
- pukeko ... pulmonate
- pulp ... Pumpokol language
- puṃsavana ... Puntjak Sukarno
- Puntland ... pure theory of law
- pure tone ... Purple Rain
- Purple Rain ... Pushing Tin
- Pushkar ... Putto with Dolphin
- putty ... Pye, Lucian
- pyelogram ... Pylstaert
- Pym, Barbara ... Pyrocephalus rubinus
- pyrochlore ... Pythagoreanism
- Pytheas ... PZT
