Terms from Photosphere to Punctuation
- Photosphere
- Photosynthesis
- Phototherapy
- Phototypesetter
- Photovoltaic Effect
- Phra Paramindr Maha Chulalongkorn Biography (1853–1910)
- Phreaker
- Phrenology
- Phrygia
- Phryne Biography (4th-c BC)
- Phuket (formerly Salang or Junkseylon)
- Phyllis Kirk Biography (1927–2006) (originally Phyllis Kirkegaard)
- Phyllis Lehmann Biography (1912– ) (née Williams)
- Phylloxera
- Phylogeny
- Phylum
- Physalis
- Physical Chemistry
- Physical Fitness
- Physicalism
- Physician
- Physics
- Physiocrats
- Physiological Psychology
- Physiology
- Physiotherapy
- Phytic Acid
- Phytochrome
- Phytogeography
- Phytosaur
- Pi (π)
- Piacenza (ancient Placentia)
- Piagetian Psychology
- Piano
- Pianola
- Piapiac
- Piatra Or Piatra-Neamţ
- Piazza Del Popolo
- Pica
- Picardy (Fr Picardie)
- Picaresque Novel ((Span picaro ‘rogue’))
- Piccolo
- Pichincha
- Pick-up
- Pickerel
- Picketing
- Picric Acid
- Pictography
- Pictor ((Lat ‘easel’))
- Picts ((Lat picti ‘painted people’))
- Picturesque
- Piddock
- Pidgin
- Pie Quebrado (Eng ‘broken foot’)
- Pied Piper Of Hamelin
- Piedmont (Ital Piemonte)
- Piedrahita
- Pier Antonio Quarantotti Gambini Biography (1910–65)
- Pier Della Vigna Biography (c.1190–1249)
- Pier Fortunato Calvi Biography (1817–55)
- Pier Francesco Giambullari Biography (1495–1555)
- Pier Iacopo Martello Biography (1665–1727)
- Pier Luigi Farnese Biography (1503–47)
- Pier Luigi Nervi Biography (1891–1979)
- Pier Maria Rosso Di San Secondo Biography (1887–1956)
- Pier Paolo Pasolini Biography (1922–75)
- Pier Vittorio Tondelli Biography (1955–91)
- Pierce Brosnan Biography (1953– )
- Pierce Butler Biography (1866–1939)
- Piero Bargellini Biography (1897–1980)
- Piero Calamandrei Biography (1889–1956)
- Piero Capponi Biography (1446–96)
- Piero Chiara Biography (1913–86)
- Piero Citati Biography (1930– )
- Piero Della Francesca Biography (c.1420–92)
- Piero Di Cosimo Biography (c.1462–c.1521) (originally Piero di Lorenzo)
- Piero Gobetti Biography (1901–26)
- Piero Jahier Biography (1884–1966)
- Piero Maroncelli Biography (1795–1846)
- Pierre
- Pierre (-François-Marie-Louis) Boulle Biography (1912–94)
- Pierre (Albert Espinasse) Brasseur Biography (1903–72)
- Pierre (Alexandre Claudius) Balmain Biography (1914–82)
- Pierre (Ambroise François) Choderlos De Laclos Biography (1741–1803)
- Pierre (Athanase) Larousse Biography (1817–75)
- Pierre (Carlet De Chamblain De) Marivaux Biography (1688–1763)
- Pierre (Charles Jean Baptiste Sylvestre) De Villeneuve Biography (1763–1806)
- Pierre (Cécile) Puvis De Chavannes Biography (1824–98)
- Pierre (Elliott) Trudeau Biography (1919–2000)
- Pierre (Eugène) Du Simitière Biography (1736–84)
- Pierre (Jules César) Janssen Biography (1824–1907)
- Pierre (Marie) Poujade Biography (1920–2003)
- Pierre (Maurice Marie) Dühem Biography (1861–1916)
- Pierre Alexandre Vignon Biography (1763–1828)
- Pierre André Lancelot Biography (c.1615–95)
- Pierre Aubert Biography (1927– )
- Pierre Auguste Renoir Biography (1841–1919)
- Pierre Augustin Caron De Beaumarchais Biography (1732–99) (originally Pierre Augustin Caron)
- Pierre Bayle Biography (1647–1706)
- Pierre Beauchamp Biography (1636–1705)
- Pierre Belon Biography (1517–64)
- Pierre Benoît Biography (1885–1962)
- Pierre Bonnard Biography (1867–1947)
- Pierre Bottineau Biography (c.1817–95)
- Pierre Bouguer Biography (1698–1758)
- Pierre Boulez Biography (1925– )
- Pierre Béroul Biography (12th-c)
- Pierre Cardin Biography (1922– )
- Pierre Chareau Biography (1883–1950)
- Pierre Charles L'Enfant Biography (1754–1825)
- Pierre Charles Lemonnier Biography (1715–99)
- Pierre Charron Biography (1541–1603)
- Pierre Corneille Biography (1606–84)
- Pierre Coton Biography (1564–1626)
- Pierre D' Ailly Biography (1350–1420) (Lat Petrus de Alliaco)
- Pierre D' Aubusson Biography (1423–1503)
- Pierre Daninos Biography (1913–2005)
- Pierre De Brantôme Biography (c.1530–1614) (in full Pierre de BourdeilleAbbé et seigneur de (Lord of) Brantôme)
- Pierre De Bérulle Biography (1575–1629)
- Pierre De Coubertin Biography (1863–1937)
- Pierre De Fermat Biography (1601–65)
- Pierre De Ronsard Biography (1524–85)
- Pierre Durand Biography (1955– )
- Pierre Emile Martin Biography (1824–1915)
- Pierre Etaix Biography (1928– )
- Pierre Francheville Or Franqueville Biography (1548–1616)
- Pierre Franey Biography (1921– )
- Pierre G(ustave) T(outant) Beauregard Biography (1818–93)
- Pierre Gassendi Biography (1592–1655)
- Pierre Girauld De Nolhac Biography (1859–1936)
- Pierre Henry Biography (1927– )
- Pierre Janet Biography (1859–1947)
- Pierre Jean De Béranger Biography (1780–1857)
- Pierre Jean De Smet Biography (1801–70)
- Pierre Joseph Pelletier Biography (1788–1842)
- Pierre Joseph Proudhon Biography (1809–65)
- Pierre Kemp Biography (1886–1967) (popular name of Petrus Johannes Kemp)
- Pierre Larivey Biography (c.1550–1619)
- Pierre Laval Biography (1883–1945)
- Pierre Le Muet Biography (1591–1669)
- Pierre Legros Biography (1666–99)
- Pierre Lescot Biography (c.1515–78)
- Pierre Louis Dulong Biography (1785–1838)
- Pierre Louis Moreau De Maupertuis Biography (1698–1759)
- Pierre Louÿs Biography (1870–1925) (pseudonym of Pierre Louis)
- Pierre MacOrlan Biography (1883–1970)
- Pierre Marie Biography (1853–1940)
- Pierre Mauroy Biography (1928– )
- Pierre Menard Biography (1766–1844)
- Pierre Mendès France Biography (1907–82)
- Pierre Mignard Biography (1612–95)
- Pierre Monteux Biography (1875–1964)
- Pierre Néraud Le Mouton De Boisdeffre Biography (1924–2002)
- Pierre Paul Prud'hon Biography (1758–1823)
- Pierre Puget Biography (1620–94)
- Pierre Reverdy Biography (1889–1960)
- Pierre S(amuel) Du Pont Biography (1870–1954)
- Pierre Savorgnan De Brazza Biography (1852–1905)
- Pierre Schaeffer Biography (1910–95)
- Pierre Soulages Biography (1919– )
- Pierre Subleyras Biography (1699–1749)
- Pierre Teilhard De Chardin Biography (1881–1955)
- Pierre Toussaint Biography (1766–1853)
- Pierre Vernier Biography (c.1580–1637)
- Pierre Victurnien Vergniaud Biography (1753–93)
- Pierre-André Latreille Biography (1762–1833)
- Pierre-Claude Nivelle De La Chaussée Biography (1692–1754)
- Pierre-François Léonard Fontaine Biography (1762–1853)
- Pierre-Jean David Biography (1789–1856) (known as David d'Angers)
- Pierre-Jean Jouve Biography (1887–1976)
- Pierre-Jean Rémy Biography (1937– ) (pseudonym of Jean-Pierre Angremy)
- Pierre-Paul Saint-Pol-Roux Biography (1861–1940) (pseudonym of Pierre-Paul Roux)
- Pierrot
- Pierrot Show
- Piet (Petrus Antonius Josephus Maria) Steenkamp Biography (1925– )
- Piet (Petrus Jacobus) Joubert Biography (1831–1900)
- Piet Cronje Biography (1835–1911)
- Piet Lieftinck Biography (1902–89)
- Piet Mondrian Biography (1872–1944) (originally Pieter Cornelis Mondriaan)
- Piet Pietersz Hein Or Heyn Biography (1577–1629)
- Pieter Adriaansz. Van Der Werff Biography (1529–1603)
- Pieter Aertsen Biography (1508/9–79)
- Pieter Both Biography (1550–1615)
- Pieter Brueghel Biography (c.1520–69) (also spelled Bruegel or Breughelknown as the Elder)
- Pieter Bukman Biography (1934– )
- Pieter Cornelis Boutens Biography (1870–1943)
- Pieter Dankert Biography (1934–2003)
- Pieter De Groot Biography (1615–78)
- Pieter De Hooch Or Hoogh Biography (c.1629–c.1684)
- Pieter De La Court Biography (1618–85)
- Pieter Geyl Biography (1887–1966)
- Pieter Jacobus Oud Biography (1886–1968)
- Pieter Jansz(oon) Saenredam Biography (1597–1665)
- Pieter Jelles Troelstra Biography (1860–1930)
- Pieter Jongeling Biography (1909–85)
- Pieter Langendijk Biography (1683–1756)
- Pieter Nicolaas Van Eyck Biography (1887–1954) (originally Pieter Nicolaas van Eijk)
- Pieter Paulus Biography (1754–96)
- Pieter Sjoerds Gerbrandy Biography (1885–1961)
- Pieter Van Laar Biography (c.1590–c.1658) (nickname i Bamboccio (‘the Cripple’))
- Pieter Van Vollenhoven Biography (1939– )
- Pieter Wilhelm Adraan Cort Van Der Linden Biography (1846–1935)
- Pieter Zeeman Biography (1865–1943)
- Pietermaritzburg (or Maritzburg)
- Pietism
- Pietro (Berrettini) Da Cortona Biography (1596–1669)
- Pietro Angelo Secchi Biography (1818–78)
- Pietro Annigoni Biography (1910–88)
- Pietro Aretino Biography (1492–1557)
- Pietro Badoglio Biography (1871–1956)
- Pietro Bastogi Biography (1808–98)
- Pietro Belluschi Biography (1899–1994)
- Pietro Bembo Biography (1470–1547)
- Pietro Bernini Biography (1562–1629)
- Pietro Borsieri Biography (1786–1852)
- Pietro Cavallini Biography (c.1250–c.1330)
- Pietro Chiari Biography (1711–85)
- Pietro Colletta Biography (1775–1831)
- Pietro Degli Angeli Biography (1517–96) (originally Pier Angelo Bargeo)
- Pietro Di Donato Biography (1911–92)
- Pietro Fortini Biography (c.1500–62)
- Pietro Giordani Biography (1774–1848)
- Pietro Lombardo Biography (c.1435–1515)
- Pietro Longhi Biography (1702–85) (originally Pietro Falca)
- Pietro Lorenzetti Biography (c.1280–c.1348)
- Pietro Mascagni Biography (1863–1945)
- Pietro Metastasio Biography (1698–1782) (originally Pietro Armando Dominico Trapassi)
- Pietro Micca Biography (1677–1706)
- Pietro Nenni Biography (1891–1980)
- Pietro Pancrazi Biography (1893–1952)
- Pietro Sarpi Biography (1552–1623) (pseudonym Pietro Soave Polanoalso known as Fra Paolo)
- Pietro Torrigiano Biography (1472–1528)
- Pietro Verri Biography (1728–97)
- Pietà ((Ital ‘pity’))
- Piezo-electric Effect
- Pig
- Pig-iron
- Pigeon
- Pigeon Pea
- Pigments
- Pignatelli
- Pika
- Pike
- Pilar Miró Biography (1940–97)
- Pilaster
- Pilates
- Pilchard
- Pilgrimage Of Grace
- Pilgrims Or Pilgrim Fathers
- Pilgrims' Way
- Pillars Of Hercules
- Pilot Whale
- Pilotfish
- Pilotis
- Piltdown Man
- Pimpernel
- PIN
- Pina Bausch Biography (1940– ) (popular name of Philippine Bausch)
- Pinakothek, Alte
- Pinang (city) (or Penangformerly George Town)
- Pinang (state) (or Pulau Pinangformerly Penang)
- Pinchas Zukerman Biography (1948– )
- Pinchbeck
- Pinckney (Benton Stewart) Pinchback Biography (1837–1921)
- Pindar Biography (518–438 BC)
- Pindus Mountains (Gr Píndhos Oros)
- Pine
- Pine Marten
- Pineal Gland
- Pineapple
- Pingo
- Pinhole Glasses
- Pink
- Pink Salmon
- Pinnate
- Pinochle
- Pinta
- Pintail
- Pintupi
- Pinturicchio Biography (1454–1513) (originally Bernardino di Betto Vagio)
- Piombi
- Pion
- Pioneer Programme
- Piotr Ilyich Tchaikovsky Or Tschaikovsky Biography (1840–93)
- Pipa
- Pipe Rolls
- Pipefish
- Piper Alpha
- Piper Laurie Biography (1932– ) (originally Rosetta Jacobs)
- Pipistrelle
- Pipit
- Piraeus (Gr Piraiéus)
- Piranha
- Pirani Gauge
- Pisa
- Pisa, Republic Of
- Pisces ((Lat ‘fishes’))
- Piscis Austrinus ((Lat ‘southern fish’))
- Pisistratus Biography (c.600–527 BC) (also spelled Peisistratos)
- Pissis, Monte
- Pistachio
- Pistoia
- Pistol
- Pisuerga, River
- Pit Viper
- Pitcairn Islands
- Pitch (acoustics)
- Pitch (chemistry)
- Pitchblende Or Uraninite
- Pitcher Plant
- Pitesţi
- Pitirim A(lexandrovich) Sorokin Biography (1889–1968)
- Pitjantjatjara
- Pitot Tube
- Pittacus Of Mytilene Biography (650–570 BC)
- Pitti Palace
- Pittosporum
- Pittsburgh
- Pittsfield
- Pituitary Gland
- Pius II Biography (1405–64) (originally Enea Silvio Piccolomini)
- Pius IV Biography (1499–1565) (originally Giovanni Angelo Medici)
- Pius IX Biography (1792–1878) (known as Pio Nonooriginally Giovanni Maria Mastai-Ferretti)
- Pius VI Biography (1717–99) (originally Giovanni Angelo Braschi)
- Pius VII Biography (1742–1823) (originally Gregorio Barnaba Chiaramonti)
- Pius VIII Biography (1761–1830) (originally Francesco Xaverio Castiglione)
- Pius XI Biography (1857–1939) (originally Ambrogio Damiano Achille Ratti)
- Pius XII Biography (1876–1958) (originally Eugenio Maria Giuseppe Giovanni Pacelli)
- Pixel
- Placebo
- Placenta (anatomy)
- Placenta (botany)
- Placodermi
- Plague
- Plaice
- Plaid Cymru
- Plain, The (known as the Marais)
- Plainchant
- Plainfield
- Plains Indians
- Plains Wanderer
- Planarian
- Planck Length
- Planck's Constant
- Plane (mathematics)
- Plane Tree
- Planet
- Planetarium
- Planetary Nebula
- Planimeter
- Plankton
- Planned Economy
- Plano
- Plant
- Plant Breeding
- Plant Genetic Resources
- Plant Hopper
- Plantagenets
- Plantain (Plantago)
- Plantation
- Plas Newydd
- Plasma (physics)
- Plasma (physiology)
- Plasma Screen
- Plasmapheresis (or plasma exchange)
- Plassey, Battle Of
- Plastic Deformation
- Plastic Surgery
- Plastics
- Plataea
- Plate (cinematography)
- Plate (photography)
- Plate Tectonics
- Plate, River (Span Río de la Plata)
- Plateau Indians
- Platelets
- Platform Tennis
- Platinum
- Platinum Metals
- Plato Biography (c.428–347 BC)
- Platonic Solids
- Plattsburg
- Platyhelminthes
- Player Piano
- Playgroup
- Playing Cards
- Plea Bargaining
- Plebeians (or plebs)
- Plectrum
- Pleiades (astronomy)
- Pleiades (mythology)
- Pleiotropy
- Pleistocene Epoch
- Plenzdorf, Ulrich Biography (1934– )
- Plesiosaur
- Pleurisy
- Pliegos Sueltos ((Eng ‘loose sheets’))
- Pliny (the Elder) Biography (23–79) (in full Gaius Plinius Secundus)
- Pliny (the Younger) Biography (c.62–c.114) (in full Gaius Plinius Caecilius Secundus)
- Pliny Earle Biography (1809–92)
- Pliocene Epoch
- Pliosaur
- PLO (Palestine Liberation Organization)
- Ploieşti
- Plotinus Biography (c.205–70)
- Plough
- Plough Monday
- Plough, The
- Plovdiv (formerly PhilippopoliLat EvmolpiaThracian Pulpudeva)
- Plover
- Plum
- Plume Moth
- Pluralism (philosophy)
- Pluralism (politics)
- Plutarch Biography (c.46–c.120) (Gr Ploutarchos)
- Plutarco Elias Calles Biography (1877–1945)
- Pluto (astronomy)
- Pluto (mythology)
- Plutocracy
- Plutonic Rock
- Plutonium
- Plymouth (Montserrat)
- Plymouth (UK)
- Plymouth (USA)
- Plymouth Brethren
- Plynlimon Fawr
- Plzeň (Ger Pilsen)
- Plácido Domingo Biography (1941– )
- Pneumatophore
- Pneumococcus
- Pneumoconiosis
- Pneumonia
- Pneumothorax
- Po, River (ancient PadusGr Eridanos)
- Pobedy, Peak
- Pocahontas Biography (1595–1617) (personal name Matoaka)
- Pochard
- Pocket Borough
- Pocket Gopher
- Podestà
- Podgorica (formerly Titograd (1946–92))
- Poerio, Family
- Poet Laureate
- Poetic Licence
- Poetry ((Gr poiein ‘to make’))
- Poggio Bracciolini Biography (1380–1459)
- Poikilotherm
- Poinsettia
- Point-of-sale (POS) Terminal
- Point-to-point
- Pointe-Noire
- Pointe-à-Pitre
- Pointer
- Poison
- Poison Gas
- Poison Ivy
- Poisson's Ratio
- Poissy, Colloque De
- Poitiers
- Poitou
- Poker
- Pokeweed
- Pokhara Valley
- Pol Pot Biography (1926–98) (also called Saloth Sar)
- Polak En Van Gennep
- Poland
- Poland, Partitions Of
- Polar Bear
- Polar Co-ordinates
- Polar Front
- Polarimetry
- Polaris
- Polaris Missile
- Polarity
- Polarity Therapy
- Polarization
- Polarizing Filter
- Polarography
- Polaroid (photography)
- Polaroid (technology)
- Polder
- Pole Vault
- Polecat
- Poles
- Police
- Police Actions (Dutch Politiële Acties)
- Policy Unit
- Polidoro Caldara Da Caravaggio Biography (c.1492–1543)
- Poliomyelitis
- Polis ((plural poleis))
- Polish Corridor
- Polish Literature
- Politburo
- Politian Or Poliziano Biography (1454–94) (originally Angelo Ambrogini)
- Political Action Committee
- Political Correctness
- Political Economy
- Political Philosophy
- Political Science
- Political Sociology
- Politieke Partij Radikalen (PPR)
- Polka
- Polkinghorne, John Biography (1930– )
- Pollack
- Pollen
- Pollination
- Pollution
- Polly Toynbee Biography (1946– ) (popular name of Mary Louisa Toynbee)
- Polo
- Polo
- Polonaise
- Polonnaruwa
- Polotsk
- Poltava
- Poltergeist
- Polyamides
- Polyanthus
- Polyarchy
- Polybius Biography (c.200–c.120 BC)
- Polycentrism
- Polychromy
- Polyclitus Or Polycleitos Biography (5th-c BC)
- Polycrates Biography (6th-c BC)
- Polycythaemia / Polycythemia
- Polydore Vergil Biography (1470–1555) (Ital Polidoro Vergilio)
- Polyembryony
- Polyesters
- Polyethylene
- Polygamy
- Polygene
- Polygnotos Or Polygnotus Biography (5th-c BC)
- Polygon
- Polyhedron
- Polyhymnia
- Polykarp Kusch Biography (1911–93)
- Polymerase Chain Reaction (PCR)
- Polymerization
- Polymorphism (biology)
- Polymorphism (chemistry)
- Polymyositis
- Polynesia
- Polynices Or Polyneices
- Polynomial
- Polyp (medicine)
- Polyp (zoology)
- Polyphemus
- Polyphony
- Polyploidy
- Polypody
- Polypropylene
- Polysaccharides
- Polytechnic
- Polytetrafluorethylene (PTFE)
- Polytheism
- Polytonality
- Polytope
- Polyunsaturated Fatty Acids
- Polyurethanes (or polycarbamates)
- Polyvinylacetate
- Polyvinylchloride (PVC)
- Polywater
- Pomegranate
- Pomerania (Ger PommernPolish Pomorze)
- Pomeranian
- Pomona
- Pompano
- Pompeii (Ital Pompei [pompay])
- Pompeo Girolamo Batoni Or Battoni Biography (1708–87)
- Pompeo Neri Biography (1706–76)
- Pompeu Fabra Biography (1868–1948)
- Pompey Biography (106–48 BC) (in full Gnaeus Pompeius Magnusknown as Pompey the Great)
- Pomponius Mela Biography (fl.43)
- Ponape Or Pohnpei
- Ponce
- Pond Skater
- Pondicherry
- Pondweed
- Ponta Delgada
- Ponte Vecchio
- Pontevedra
- Pontiac Biography (c.1720–69)
- Pontiac's Conspiracy Or Rebellion
- Pontius Pilate Biography (1st-c) (Lat Pontius Pilatus)
- Pontoon
- Pontoon Bridge
- Pontus
- Pontus De Tyard Biography (c.1521–1605)
- Pontypridd
- Pony Club
- Pony Express
- Ponza Islands (also known as Pontine IslandsItal Isole di Ponza)
- Poodle
- Pool
- Poole
- Poona Or Pune
- Poopó, Lake ((Span Lago))
- Poor Laws
- Pop Art
- Pop Group
- Pop Hart Biography (1868–1933) (popular name of George (Overbury) Hart)
- Pop Music
- Pop Poetry
- Popayán
- Pope ((Lat papaGk papas‘father’))
- Popish Plot
- Poplar
- Poplarville
- Popocatépetl
- Poppaea Sabina Biography (?–65)
- Poppy
- Popski's Private Army
- Popular Culture
- Popular Front
- Population
- Population Biology
- Population Density
- Population Genetics
- Populism
- Populist Party
- Popé Biography (?–1690)
- Porcelain
- Porcupine
- Porcupine-fish
- Pornography
- Porosity
- Porphyria
- Porphyry Biography (c.233–304)
- Port
- Port Augusta
- Port Elizabeth
- Port Harcourt
- Port Louis
- Port Moresby
- Port Of Spain
- Port Royal
- Port Said (Arabic Bur Said)
- Port San Carlos
- Port Sudan
- Port-au-Prince
- Portadown
- Portfolio Theory
- Portico
- Portland (Maine)
- Portland (Oregon)
- Portland, Isle Of
- Portlaoighise (or Port Laoiseformerly Maryborough)
- Porto Novo
- Porton Down
- Portree
- Portrush (Ir Port Rois)
- Portsmouth (New Hampshire)
- Portsmouth (Ohio)
- Portsmouth (UK)
- Portsmouth (Virginia)
- Portugal
- Portuguese Literature
- Portuguese Man-of-war
- Porvoo (Swed Borgå)
- Poseidon
- Poseidon Weed
- Posidonius Or Poseidonius Biography (c.135–c.51 BC)
- Positivism
- Positron
- Possession
- Possible Worlds
- Possum
- Post And Lintel / Lintol
- Post Mortem
- Post-industrial Society
- Post-natal Depression
- Post-production
- Post-traumatic Stress Disorder
- Postage Stamp
- Postal Service
- Poster Art
- Postimpressionism
- Postmodern Dance
- Postmodernism
- Postpartum Haemorrhage / Hemorrhage
- Posts, Telegraph And Telephones Authority (PTT)
- PostScript
- Poststructuralism
- Pot Marigold
- Potala Palace
- Potash
- Potassium
- Potassium–argon Dating
- Potato
- Potato Blight
- Potential
- Potential Difference
- Potential Energy
- Potentilla
- Potentiometer
- Potlatch
- Potomac River
- Potosí
- Potsdam
- Potsdam Conference
- Potsdamer Abkommen
- Potter Palmer Biography (1826–1902)
- Potter Stewart Biography (1915–85)
- Potter Wasp
- Potteries, The
- Pottery
- Potto
- Pottsville
- Pouched Rat
- Poughkeepsie
- Poul (Holmskov) Schlüter Biography (1929– )
- Pound (economics)
- Poverty Trap
- POW
- Powder Metallurgy
- Powell Clayton Biography (1833–1914)
- Power (physics)
- Power Boating
- Powerboat Racing
- Powhatan Biography (?1550–1618) (originally Wahunsonacock)
- Powhatan Confederacy
- Powys
- Poyang Hu Or P'o-yang Hu
- Poynings' Law (also known as the Statutes of Drogheda)
- Poznań (Ger Posen)
- Poète Maudit
- Prado
- Praetorian Guard
- Praetors
- Pragmatic Sanction (Ger Pragmatische Sanktion)
- Pragmatics
- Pragmatism
- Prague (Czech Praha)
- Praia
- Prairie
- Prairie Chicken
- Prairie Dog
- Prairie Schooner
- Praise-God Barebone Or Barbon Biography (c.1596–1679)
- Pratincole
- Prawn
- Praxiteles Biography (4th-c BC)
- Prayer
- Praying Mantis
- Pre-Columbian Art And Architecture
- Pre-eclampsia
- Pre-Raphaelite Brotherhood (PRB)
- Precambrian Era
- Precedent
- Precession
- Precession Of The Equinoxes
- Precipitate
- Precipitation
- Predella
- Predestination
- Prefabrication
- Prefect
- Preference Shares
- Pregnancy
- Prejudice
- Prelude
- Premenstrual Syndrome / Tension (PMS, PMT)
- Premier Division
- Premiss
- Premium Bond
- Premonstratensians
- Prenatal Diagnosis
- Prentiss Ingraham Biography (1843–1904)
- Preparatory School
- Prepared Piano
- Presbyterianism
- Presbytery (architecture)
- Presbytery (Presbyterianism)
- Presbytery (Roman Catholicism)
- Preschool Education
- Prescription
- Prescriptivism
- President
- Presidential Medal Of Freedom
- Presidi, Stato Dei (Eng State of the Fortresses)
- Presiding Officer
- Presley (Neville) O'Bannon Biography (1776–1850)
- Presocratics
- Press Freedom
- Press-moulded Glass
- Pressure
- Pressure Gauge
- Pressure Group
- Prestel
- Prester John
- Preston
- Preston (Everett) James Biography (1899–1986)
- Preston (Smith) Brooks Biography (1819–1857)
- Preston Dickinson Biography (1891–1930)
- Preston Sturges Biography (1898–1959) (originally Edmund Preston Biden)
- Prestonpans
- Prestwick
- Pretoria (known as Tshwane (‘we are the same’) from 2005.)
- Preußenputsch
- Preußische Reformen
- Preventive Medicine
- Priam
- Pribilof Islands
- Prices And Incomes Policy
- Prickly Heat
- Prickly Pear
- Pride Of India
- Priest
- Prijs Der Nederlandse Letteren (Eng ‘Prize of Dutch Literature’)
- Primary
- Primary Colours
- Primary Education
- Primate (religion)
- Primate (zoology)
- Prime Minister
- Prime Number
- Prime Rate
- Primitivism
- Primo Levi Biography (1919–87)
- Primrose
- Prince Biography (1958– ) (stage name by which Prince Roger Nelson is most widely known)
- Prince Albert Biography (1819–61) (in full Francis Albert Augustus Charles EmmanuelPrince of Saxe-Coburg-Gotha)
- Prince Alexander Michaelovich Gorchakov Biography (1798–1883)
- Prince Alexander Of Battenberg Biography (1820–93)
- Prince Aritomo Yamagata Biography (1838–1922)
- Prince Arthur Biography (1486–1502)
- Prince Arthur Biography (1187–?1203)
- Prince Charles Edward (Louis Philip Casimir) Stuart Or Stewart Biography (1720–88) (known as the Young Pretender and Bonnie Prince Charlie)
- Prince De Condé, Louis I De Bourbon Biography (1530–69)
- Prince De Condé, Louis II De Bourbon Biography (1621–86) (known as the Great Condé)
- Prince De Polignac, Auguste Jules Armand Marie Biography (1780–1847)
- Prince De Rohan-Guéménée, Louis René Edouard Biography (1734–1803)
- Prince Edward (Antony Richard Louis) Biography (1964– )
- Prince Edward Island
- Prince Eugene Of Savoy Biography (1663–1736) (in full François Eugène de Savoie Carignan)
- Prince Georgy Yevgenyevich Lvov Biography (1861–1925)
- Prince James (Francis Edward) Stuart Or Stewart Biography (1688–1766) (also known as the Old Pretender)
- Prince Michael Gorchakov Biography (1795–1861)
- Prince Michael Of Kent Biography (1942– )
- Prince Norodom Sihanouk Biography (1922– )
- Prince Of Baden Maximilian Biography (1867–1929)
- Prince Of Canosa, Antonio Capece Minutolo Biography (c.1768–1838)
- Prince Of Saxe-Coburg-Gotha, Alfred Ernest Albert Biography (1844–1900)
- Prince Of Venosa Gesualdo, Don Carlo Biography (c.1560–1613)
- Prince Of Wales
- Prince Of Wales Charles (Philip Arthur George) Biography (1948– )
- Prince Ranjitsinhji Biography (1872–1933)
- Prince Rupert Biography (1619–82) (also known as Rupert of the Rhine)
- Prince Sadruddin Aga Khan Biography (1933–2003)
- Prince Souphanouvong Biography (1909–95)
- Princess Adela Biography (c.1062–1137)
- Princess Alice Maud Mary Biography (1843–78)
- Princess Anne (Elizabeth Alice Louise) Biography (1950– )
- Princess Charlotte (Augusta) Biography (1796–1817)
- Princess Herangi Te Puea Biography (1883–1952)
- Princess Margaret (Rose) Biography (1930–2002)
- Princess Of Wales Diana Biography (1961–97) (formerly Lady Diana (Frances) Spencer)
- Princess Royal
- Princeton
- Principality
- Prinsgezinden
- Printed Circuit
- Printing
- Prion
- Prion Disease
- Prior Park
- Priors
- Priscian Biography (6th-c) (Lat Priscianus)
- Priscillian Biography (c.340–385)
- Prism
- Prison
- Pritzker Architecture Prize
- Private Enterprise
- Private Sector
- Privatization
- Privet
- Privilegium Othonis
- Privy Council
- Prix De L'Arc De Triomphe
- Prix Goncourt
- Prix Méliès
- Prix Renaudot
- Prizren
- Priština
- Pro-life Movement
- Probability Theory
- Probate
- Probation
- Proboscis Monkey
- Procaryote Or Prokaryote
- Procedural Programming
- Processing (photography)
- Processionary Caterpillar
- Proclus Biography (c.412–85)
- Procopius Biography (c.499–565)
- Procrustes
- Procurator Fiscal
- Producer
- Producer Gas
- Productivity
- Professor Longhair Biography (1918–80) (pseudonym of Henry Roeland Byrd)
- Profit
- Progesterone
- Prognosis
- Programme Music
- Programmed Learning
- Programming Language
- Progress Spacecraft
- Progressive Conservative (PC) Party
- Progressive Education
- Progressive Party
- Progressive Taxation
- Prohibition
- Projection Television
- Projective Geometry
- Projective Tests
- Projector
- Prokop Or Procop(ius) Biography (c.1380–1434) (known as the Bald or the Great)
- Prolactin
- Prolapsed Intervertebral Disc
- Proletariat ((Lat proletarii‘Those who serve the state not with property but with offspring’))
- PROLOG
- PROM
- Promenade Concert
- Prometheus
- Promissory Note
- Promoter (genetics)
- Pronation
- Pronghorn
- Propane
- Propellant (chemistry)
- Propellant (fuel)
- Propeller
- Property
- Propfan
- Prophet
- Proportional Counter
- Proportional Representation
- Propyl
- Propylaeum Or Propylaea
- Proscenium
- Prose ((Lat prosa oratio ‘straightforward discourse’))
- Prose Poem
- Prosecution
- Prosimian
- Prosody
- Prosopography
- Prosper Louis Pascal Guéranger Biography (1805–75)
- Prosper Mérimée Biography (1803–70)
- Prospero Alpini Biography (1553–1616) (Lat Prosper Alpinus)
- Prostaglandins
- Prostate Gland
- Prosthesis
- Protagoras Biography (c.490–421 BC)
- Protea
- Protectionism
- Protective Coloration / Colouration
- Protectorate
- Protectorate
- Protein
- Proterozoic Eon
- Protestant Ethic
- Protestantism
- Proteus
- Protochordate
- Protocols Of The Elders Of Zion
- Protoctista
- Proton
- Proton Number
- Protoplasm
- Protostar
- Protozoa
- Protozoology
- Protura
- Provence (Lat Provincia)
- Proverbs, Book Of
- Providence
- Providence
- Provincetown Players
- Provo
- Provo
- Proxemics
- Prudence Crandall Biography (1803–90) (married name Philleo)
- Prudentius Biography (348–c.410) (in full Aurelius Clemens Prudentius)
- Prudhoe Bay
- Prunella (Margaret Rumney) Scales Biography (1932– )
- Prunus
- Prussia
- Przewalski's Horse
- Préciosité, La
- Príncipe De (Prince Of) Viana, Carlos De Aragón Biography (1421–61)
- Psalms, Book Of
- Psaltery
- Psamtik I Biography (690–610 BC)
- Psephology
- Pseudepigrapha
- Pseudo-Isidorian Forgeries
- Pseudopodium
- Psi
- Psi-missing
- Psittacosis
- Pskov School
- Psoriasis
- Psyche
- Psychedelic Art
- Psychiatry
- Psychic Healing
- Psychoanalysis
- Psychodrama
- Psychohistory
- Psychokinesis (PK)
- Psycholinguistics
- Psychologism
- Psychology
- Psychometrics
- Psychometry
- Psychopathology
- Psychopharmacology
- Psychophysics
- Psychosis
- Psychosomatic Disorder
- Psychosurgery
- Psychotherapy
- Psyllid
- Ptah
- Ptarmigan
- Pteridophyte
- Pterosaur
- Ptolemaic System
- Ptolemy Biography (fl.127–145) (in full Claudius Ptolemaeus [tolemayus])
- Ptolemy I Soter Biography (c.366–c.283 BC) ((‘Saviour’))
- Ptolemy II Philadelphus Biography (308–246 BC)
- Puberty
- Public Debt
- Public Goods
- Public House
- Public Record Office (PRO)
- Public Relations (PR)
- Public Safety, Committee Of
- Public School
- Public Sector
- Public Sector Borrowing Requirement (PSBR)
- Public Switched Telephone Network (PSTN)
- Publishing
- Publius Cornelius Dolabella Biography (c.70–43 BC)
- Publius Licinius Egnatius Gallienus Biography (c.218–68)
- Publius Licinius Valerian Biography (?–260)
- Publius Quintilius Varus Biography (? BC–AD 9)
- Publius Terentius Varro Biography (c.82–37 BC)
- Pud Galvin Biography (1856–1902) (popular name of James Francis Galvin)
- Puddling Process (concrete)
- Puddling Process (iron)
- Pudge Heffelfinger Biography (1867–1954) (popular name of William Walter Heffelfinger)
- Puebla (or Heróica Puebla de Zaragoza)
- Pueblo (Indians)
- Puerperal Fever
- Puerto Cortes
- Puerto Rico (formerly Porto Rico (to 1932))
- Puff Adder
- Puffball
- Puffer
- Puffin
- Pug
- Puglia
- Pugwash Conference
- Pula (Ital PolaLat Pietas Iulia)
- Pulaski
- Puli
- Pulley
- Pulmonary Embolism
- Pulsar
- Pulsating Star
- Pulse (botany)
- Pulse (physiology)
- Pumice
- Pump
- Pumpkin
- Punch And Judy
- Punctuation