| plesso solare | solar plexus |
| pletora | glut |
| Plettenberg Bay | Plettenberg Bay |
| plettro | plectrum |
| pleurite | pleurisy |
| Pleurodira | Pleurodira |
| Pleuronectidae | Pleuronectidae |
| Pleurotus | Pleurotus |
| Pleurotus eryngii | Pleurotus eryngii |
| Pleven | Pleven |
| Pleystein | Pleystein |
| Plezzo | Bovec |
| PLI | Italian Liberal Party |
| Pliening | Pliening |
| Pliezhausen | Pliezhausen |
| Plinio | Pliny |
| plinto | die |
| Pliocene | Pliocene |
| Plist | Property list |
| Plistarco | Pleistarchus |
| Pliva | Pliva |
| Pljevlja | Pljevlja |
| PLL | Phase-locked loop |
| Plochingen | Plochingen |
| Ploieşti | Ploieşti |
| Plombières | Plombières |
| Ploscoş | Ploscoş |
| Plotina | Pompeia Plotina |
| Plotino | Plotinus |
| plotone | platoon |
| plotone d'esecuzione | firing squad |
| plotone di esecuzione | death squad |
| Plotosidae | Eeltail catfish |
| Plotting position | Q-Q plot |
| Plouer-sur-Rance | Plouer-sur-Rance |
| Plougastel | Plougastel |
| Plouguerneau | Plouguerneau |
| Plounévezel | Plounévezel |
| Plovdiv | Plovdiv |
| Plug and Play | Plug-and-play |
| Pluggable authentication modules | Pluggable Authentication Modules |
| Plugo | Oven load |
| Plum | Plum |
| plum-cake | fruitcake |
| Plumbaginaceae | Plumbaginaceae |
| Plumeria | Plumeria |
| Pluna | PLUNA |
| plurale | plural |
| Plurale maiestatico | Pluralis majestatis |
| pluralismo | pluralism |
| Pluralismo dei partiti | Multi-party system |
| Pluralismo religioso | Religious pluralism |
| Pluralit | Larger part |
