| pyretic | febbricitante |
| Pyrex | Pyrex |
| pyrexia | febbre |
| Pyrgi | Pyrgi |
| Pyrgi Tablets | Lamine di Pyrgi |
| Pyrgos | Pyrgos |
| Pyridoxal phosphate | Piridossalfosfato |
| pyrite | pirite |
| pyrites | pirite |
| pyrolysis | pirolisi |
| pyromaniac | piromane |
| pyrometer | pirometro |
| pyrometry | pirometria |
| Pyroraptor | Pyroraptor olympius |
| pyrosis | pirosi |
| pyrotechnician | pirotecnico |
| pyrotechnics | pirotecnica |
| pyroxene | pirosseno |
| Pyrrha | Pirra |
| Pyrrhic victory | vittoria di Pirro |
| Pyrrhic War | Guerre pirriche |
| Pyrrho | Pirrone |
| Pyrrhos | Pirro |
| Pyrrhus of Epirus | Pirro |
| Pyrrole | Pirrolo |
| Pyrrolysine | Pirrolisina |
| Pyruvate decarboxylation | Decarbossilazione ossidativa del piruvato |
| Pyruvate dehydrogenase | Piruvato deidrogenasi |
| Pyruvate kinase | Piruvato chinasi |
| Pyrénées-Atlantiques | Pirenei atlantici |
| Pyrénées-Orientales | Pirenei orientali |
| Pythagoras | Pitagora |
| Pythagoras of Rhegium | Pitagora di Reggio |
| Pythagorean | pitagorico |
| Pythagorean theorem | Teorema di Pitagora |
| Pythagorean triple | Terna pitagorica |
| Pythagorean tuning | Scala pitagorica |
| Pytheas | Pitea |
| Pythian Games | Giochi pitici |
| python | pitone |
| Python molurus | Python molurus |
| Python Programming | Linguaggio Python |
| Python programming language | Python |
| Python regius | Python regius |
| Python reticulatus | Python reticulatus |
| Pythonidae | Python |
| Pyu city-states | Pyu |
| pyx | pisside |
| Pyxis | Bussola |
| Pào Chuí | Sanhuang Paochui |
| Pál Dárdai | Pál Dárdai |
| Pál Maléter | Pál Maléter |
| Pál Teleki | Pál Teleki |
| Pánfilo de Narváez | Pánfilo de Narváez |
| Pâncota | Pâncota |
| pâté | pâté |
