| p'alkwanhoe ... Pacheco, Juan, Marques of Villena |
| Pachelbel, Johann ... Packard, James Ward |
| Packard, Sophia B. ... page |
| Page, Alan ... Painter, William |
| Painters Eleven ... Palaearctic vegetation |
| Palaechthon ... paleocerebellum |
| paleoclimatology ... Pallas's cat |
| Pallas, Peter Simon ... Palmquist, Gustaf |
| Palmyra ... Pan-Germanism |
| Pan-Islamism ... Pandit, Vijaya Lakshmi |
| Pandji ... Pano |
| Panocho ... Paparemborde, Robert |
| Paparizou, Helena ... para-hydrogen |
| para-xylene ... parallel lines |
| parallel magnetic circuit ... Parascaris univalens |
| parascending ... Paria Peninsula |
| Paria, Gulf of ... Park Chung Hee |
| Park City ... parlour palm |
| Parma ... parson's bench |
| Parson's Cause ... partimen |
| parting ... pasha |
| Pasha, Ragib Mehmed ... password |
| Passy ... patent |
| Patent Cooperation Treaty ... Patrick, Joseph Frank |
| Patrick, Lester B. ... Paul trap |
| Paul V ... pawn |
| pawn promotion ... Peace Park |
| Peace People, Community of ... Pearson Award |
| Pearson International Airport ... Pedersen, Holger |
| Pedersen, Johannes Peder Ejler ... Pei, I.M. |
| Pei, Mario ... Pellegrini, Carlos |
| Pellegrino, Mount ... penannular brooch |
| Penaranda, Enrique ... Penn, Sean |
| Penn, Sir William ... pentathlon |
| pentatonic scale ... People's UCR |
| People's Union ... perchlorate |
| perchloric acid ... Perez-Reverte, Arturo |
| perfect binding ... period |
| Period of Feudal Partition ... permeability coefficient |
| permease ... Persaeus |
| Persarmenia ... Pertwee, John Devon Roland |
| Pertz, Georg Heinrich ... Peter Claver, Saint |
| Peter Damian, Saint ... Petitcodiac River |
| petite Brabancon ... Petrov, Ilya |
| Petrov, Yevgeny ... Phaedo |
| Phaedra ... phase separation |
| phase speed ... Philadelphia Museum of Art |
| Philadelphia Orchestra ... Philippine Trench |
| Philippine-American War ... Phipps, Ogden |
| Phips, Sir William ... Phony War |
| phorate ... photodissociation |
| photodynamic therapy ... phratry |
| phreaking ... physical oceanography |
| physical pendulum ... Piast Route |
| piastre ... picric acid |
| picrite ... Pietarsaari |
| Pietas ... piled jetty |
| Piles, Roger de ... Pinar del Rio |
| Pinar del Rio ... Pinkerton National Detective Agency |
| Pinkerton, Allan ... Pipiolo and Pelucon |
| pipistrelle ... Pisco |
| pisco ... piton |
| pitot tube ... placenta |
| placenta ... plane of symmetry |
| plane plastic flow ... plasma instability |
| plasma jet ... platform reef |
| platform rocker ... Plectrophenax |
| Plectrude ... Plisnier, Charles |
| Plitvice Lakes ... pluviometric equator |
| ply yarn ... podcast |
| poder moderador ... point estimation |
| point flake ... Polanco, Jesus de |
| Poland ... Police Gazette, The |
| police jury ... Pollack, David |
| Pollack, Sydney Irwin ... polybutylene terephthalate |
| Polycaon ... polymyalgia rheumatica |
| polymyositis ... Pomak |
| pomander ... Pons, Lily |
| Ponselle, Rosa ... Popa, Vasko |
| Popa, Victor ... Poradeci, Lasgush |
| Porath, Jerker ... Port Gibson |
| Port Gibson, Battle of ... Porter, Eric Richard |
| Porter, Fairfield ... Portus |
| portus ... Postel, Jonathan Bruce |
| postencephalitic parkinsonism ... potassium-sparing diuretic |
| Potatau I ... Poujadisme |
| Poulenc, Camille ... power architecture |
| power brake ... Praemium Imperiale |
| Praemunire, Statute of ... Pratensis, Felix |
| Prater ... Predel Pass |
| predestination ... prenatal diagnosis |
| Prendergast, Maurice Brazil ... Presque Isle State Park |
| press ... Prevelakis, Pandelis |
| Prevention and Punishment of the Crime of Genocide, Convention on the ... Priestly Confraternity of Saint Pius X |
| Priests of the Sacred Heart of Jesus, Congregation of the ... prime number theorem |
| Prime, Cecil ... Prineville |
| Pringle, Sir John, 1st Baronet ... Privileges, Charter of |
| Privilegio de la Union ... Prock, Markus |
| Proclamation Society ... profit maximization |
| profit planning ... prokaryote |
| Prokhorov, Aleksandr Mikhaylovich ... propensity to consume |
| propensity to save ... prostacyclin |
| prostaglandin ... Protium |
| protium ... prototype |
| prototype model ... Prussian Cultural Property Foundation |
| Prussian Tariff of 1818 ... Pseudotaxus |
| Pseudotaxus chienii ... Pteria |
| Pteria penquin ... public debt |
| public defender ... Pueblo Bonito |
| Pueblo I ... Pulicoidea |
| Pulitzer Prize ... punch |
| Punch ... pure holding company |
| pure implicational calculus ... push-button dialing |
| push-pull train ... Pye, Henry James |
| pyelography ... pyridine |
| pyridinium chlorochromate ... |
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