- P ... P.S.1 Contemporary Art Center
- P.V. Sindhu ... pacemaker enzyme
- Pacensis Colonia ... Pacific Mail Steamship Company
- Pacific mountain system ... packet-switched network
- packing ... Padua
- Padua, University of ... pageant
- Pageant of the Pacific ... pailü
- Paimio ... Pais, Sidónio
- Paisà ... Pakxé
- PAL ... Palais de la gloire, Le
- Palais des Festivals ... palea
- Paleacrita vernata ... Palestinian National Authority
- Palestinian religions ... pallial retractor muscle
- palliative care ... Palmer, Arnold Daniel
- Palmer, Barbara ... palsy
- Palta ... Pan American World Airways, Inc.
- Pan Asia ... Panamanian golden toad
- Panamax ... Pandanus
- pandanus ... Pangaea
- Pangaeos, Mount ... Panna
- Panna National Park ... Panthera leo melanochaita
- Panthera leo persica ... Papá Montero
- Papa’s Delicate Condition ... paper pulp
- paper recovery system ... papyrology
- papyrus ... Paradine Case, The
- Paradip ... Paraíba
- Paraíba ... paramesonephric duct
- Paramesvara ... Paraschivescu, Miron
- Paraschwagerina ... Pardalotus
- Pardalotus punctatus ... Paria Plateau
- Paria River ... Paris Summit
- Paris Symphonies ... Park, Orlando
- Park, Randall ... Parks, Gordon Roger Alexander Buchanan
- Parks, Gordon, Jr. ... Parnicki, Teodor
- Párnis Óros ... pars compacta
- pars distalis ... Partenopeus de Blois
- parterre ... particle beam therapy
- particle density ... Partij voor de Vrijheid
- partimen ... Parvīn Eʿteṣāmī
- parvocellular layer ... Pashmakli
- pashmina ... passepied
- passer ... passive transport
- passive voice ... Pastoureaux
- pastourelle ... patellar luxation
- patellar reflex ... pathological curve
- pathological fracture ... patriciate
- patricii ... pattern knit
- pattern mining ... Paul the Hermit
- Paul the Silentiary ... Pausanias
- Pausias ... Pawtucket River
- Pawtuxet River ... Paz, Manuel de Godoy, Prince de la
- Paz, Octavio ... PDSR
- PDT ... Peach, Charles William
- peach-faced lovebird ... Pearl River
- Pearl River Convention ... Pech language
- Pech Morena ... Pedersen, Charles John
- Pedersen, Christiern ... Pedunculata
- pedunculate barnacle ... Pehlevi alphabet
- Pehlevi language ... Pelagophyceae
- Pelagophycus ... Pelleas und Melisande
- Pellegrin, Abbé ... Pembroke, Mary Herbert, countess of
- Pembroke, Richard FitzGilbert, 2nd Earl of ... pendeloque
- Pendennis ... Peninsular Malaysia
- peninsular pronghorn ... Pennsylvania Study of the Relation of Secondary and Higher Education, The
- Pennsylvania Study, The ... pentane
- Pentangle ... People of Juvik, The
- People of Seldwyla, The ... People’s Supreme Court
- People’s Theatre ... Pepple dynasty
- Peprilus alepidotus ... perched rock
- Percheron ... peregrine falcon
- Peregrine Pickle ... perfect gas
- perfect gas equation of state ... pericarp
- pericentre ... Periodos gēs
- Perionyx excavatus ... Perlman, Rhea Jo
- Perlman, Ron ... Perot, Henry Ross
- Perot, Ross ... Perry, Lee “Scratch”
- Perry, Lilla Cabot ... Persica
- Persica ... Persons, Robert
- Persons, Truman Streckfus ... Pescadores
- Pescara ... Pete, Megan Jovon Ruth
- petechia ... Peter the Just
- Peter the Tramp ... Petit, Jacob
- Petit, Philippe ... Petrodromus tetradactylus
- Petrodvorets ... Petrovsk Port
- Petrovsky Palace ... Pew, John Howard
- Pew, Joseph N., Jr. ... Phabsomphou, Sunisa
- Phacelia ... Pham Hung
- phamsana ... Pharsalus, Battle of
- pharyngeal fricative ... Phelps, Samuel
- Phelps, William Lyon ... Philadelphia
- Philadelphia ... Philidor, François-André
- Philidor, Michel ... Philippi Races
- Philippi, Battle of ... Phillips, Tom
- Phillips, W. T. ... Philosophische Untersuchungen über das Wesener menschlichen Freiheit
- Philosophische Versuche über die menschliche Natur und ihre Entwickelung ... phlyakes
- phlyakes stage ... Phoenix Mercury
- Phoenix Mountains Preserve ... phosphatide
- phosphatidic acid ... photocomposition
- photoconductive cell ... photoreception
- photoreceptor ... Phrynops hilarii
- Phrynosoma ... phylogenetic grading
- Phylogenetic Systematics ... Physiognomische Fragmente zur Beförderung der Menschenkenntnis und Menschenliebe
- Physiognomische Reisen ... Piaggia, Carlo
- Piagnoni ... Picasso, Pablo Ruiz
- Picathartes ... Pickfair
- Pickford, Mary ... Picturesque and Historical Voyage to Brazil
- piculet ... pier buttress
- Pier Damiani, San ... Pietà
- Pietarsaari ... Pigot, George
- Pigot, George Pigot, Baron ... pilgrim bottle
- Pilgrim Fathers ... Pilot Rock
- pilot whale ... pinball game
- pinball machine ... Pinelands National Reserve
- Pinelli, Giuseppe ... pinkeye
- pinkeye ... Pinus quadrifolia
- Pinus radiata ... Piperales
- piperazine ... Pirelli Family
- Pirelli SpA ... pīshṭāq
- Pisidia ... pitch clock
- pitch control ... pitted shell turtle
- Pitti Palace ... Piyamaradus
- Piyashilish ... Placuna placenta
- Plaek Khittasangkha ... Plan 9 from Outer Space
- Plan Colombia ... planispheric astrolabe
- Plank, The ... plantcutter
- Planté cell ... plastic forming
- Plastic Hearts ... Plateresco
- Plateresque ... Platystemon californicus
- Platystrophia ... Pleasant Memoirs of the Marquis de Bradomin: Four Sonatas, The
- Pleasant Valley Siding ... Plenty
- Plenty, Bay of ... Pli selon pli
- plica adiposa ... Plow, The
- Płowce, Battle of ... pluriform monotheism
- plurimum interrogationum ... PNC Park
- PNDC ... Pocahontas
- Pocałunki ... Podolsk
- Podolsky, Boris ... Poems From Prison
- Poems in Prose ... Poezye
- Poezye ... point of order
- Point of Order ... Poisson, Jeanne-Antoinette
- Poisson, Siméon-Denis ... polar climate
- Polar continental ... pole-chair
- polecat ... Polisario Front
- Polish ... Political Register
- political risk analysis ... Pollenza
- pollex ... Polus
- Poluy ... Polydoúre, Maria
- Polyeidus ... polymorph
- polymorphic variation ... Polyptych of the Misericordia
- polyrhythm ... pomerium
- Pomerium ... pond tadpole
- pond turtle ... Pontiac fever
- Pontiac GTO ... Poolman
- pools ... poplar
- Poplar Fields ... Population III
- population inversion ... Porky Pig
- Porlamar ... Port Gibson, Battle of
- Port Gilbert ... Portable Kisses
- Portable Palette ... Portinari, Cándido
- Portinari, Tommaso ... Portrait of Mademoiselle Charlotte du Val d’Ognes
- Portrait of Maria Ivanovna Lopukhina ... Poseidon missile
- Poseidonia ... possum haw
- possum oak ... posterior pituitary lobe
- posterior probability ... pot-bellied stove
- pot-roasting ... potentiality
- potentially hazardous asteroid ... Pottsville Series
- POTUS ... Povídky z jedné kapsy
- POW ... Power of Sympathy, or the Triumph of Nature Founded in Truth, The
- power of the continuum ... Poznań Riots
- Pozo Colorado ... Practice of the Presence of God, The
- Practice, The ... Prairie Home Companion, A
- Prairie la Crosse ... Pratihara dynasty
- pratima ... Pre-Chimú
- pre-Classic people ... precursor cell
- Preda, Marin ... prehensile hand
- prehensile tail ... prenatal diagnosis
- prenatal testing ... prescription
- prescription ... presidential election of 2004
- Presidential Election of 2008 ... pressure remanent magnetization
- pressure ridge ... Pretty Woman
- Pretty Woman: The Musical ... Price, Carey
- Price, David ... Priest and the Jester, The
- Priest Lake ... primary interjection
- primary literature ... primeval forest
- Primevères ... Prince of Foxes
- Prince of Gymnastics, the ... Principal Navigations, Voyages and Discoveries of the English Nation, The
- principal quantum number ... printmaking
- Printz v. United States ... Pristella riddlei
- Pristidae ... privilege
- Privilege of Nieszawa ... probiotic
- problem ... processionary caterpillar
- Procházka, Jan ... producing
- product ... profit
- profit ... Progressive movement
- progressive multifocal leukoencephalopathy ... Prokop
- Prokop Holý the Shaven ... Promised Land, The
- Promised Land, The ... propeller turbine
- propelling charge ... proposition
- Proposition 209 ... Prosopis ruscifolia
- Prosopium ... protection, nominal rate of
- protection, principle of ... Protium
- protium ... proton microprobe
- proton NMR ... Provence-Côte d’Azur
- provendier ... proximity fuze
- Proxmire, Edward William ... Pryazovska Vysochyna
- Pryce, Simon ... Psammodrilus
- Psammomys ... pseudoionone
- Pseudois ... Psilotaceae
- Psilotophyta ... psychocultural interpretation theory
- Psychodiagnostics ... psyllium
- Psyllophryne didactyla ... pterygium
- pterygopalatine ganglion ... pubescent phase
- pubic bone ... Public Speaking
- public speaking ... Puebla, Anniversary of the Battle of
- Puebla, Battle of ... Puffinus auricularis
- Puffinus griseus ... Pulkovo, Battle of
- pull ... pulse-height analyzer
- pulse-height spectrometry ... Punic War, Third
- Punic Wars ... Puratan
- Purattu ... Purity, Brethren of
- Purkinje cell ... Purtscheller, Ludwig
- Puruhá ... Puteshestvie v Zemlyu Ofirskuyu
- Putesky, Scott ... PVAc
- PVB ... pygmy sunfish
- pygmy swiftlet ... pyran
- pyrantel pamoate ... pyroxenite
- pyroxylin ... PZT
