| psautier | psalter |
| Pschent | Pschent |
| pschtt | shoo |
| Psephotus chrysopterygius | Golden-shouldered Parrot |
| Psephotus dissimilis | Hooded Parrot |
| Psephotus haematonotus | Red-rumped Parrot |
| Psephotus varius | Mulga Parrot |
| Pseudalopex | Pseudalopex |
| Pseudalopex culpaeus | Culpeo |
| Pseudalopex sechurae | Sechura Fox |
| Pseudalopex vetulus | Hoary Fox |
| Pseudantechinus | False antechinus |
| Pseudarthrose | Pseudarthrosis |
| Pseudechis | Pseudechis |
| Pseudechis australis | Pseudechis australis |
| Pseudibis gigantea | Giant Ibis |
| Pseudibis papillosa | Black Ibis |
| Pseudis paradoxa | Pseudis paradoxa |
| Pseudo Echo | Pseudo Echo |
| pseudo- | pseudo |
| Pseudo-aléatoire | Pseudorandomness |
| Pseudo-distance | Pseudorange |
| Pseudo-fossile | Pseudofossil |
| Pseudo-inverse | Generalized inverse |
| Pseudo-Longin | Longinus |
| Pseudo-philosophie | Pseudophilosophy |
| Pseudo-potentiel | Pseudopotential |
| Pseudo-science | Pseudoscience |
| Pseudobranchus axanthus | Southern Dwarf Siren |
| Pseudobranchus striatus | Northern Dwarf Siren |
| Pseudobulbe | Pseudobulb |
| Pseudocheiridae | Pseudocheiridae |
| Pseudochirops archeri | Green Ringtail Possum |
| Pseudogène | Pseudogene |
| Pseudohermaphrodisme masculin par insensibilité aux androgènes | Androgen insensitivity syndrome |
| Pseudois nayaur | Bharal |
| Pseudolarix | Pseudolarix |
| Pseudomonas aeruginosa | Pseudomonas aeruginosa |
| Pseudomonas syringae | Pseudomonas syringae |
| Pseudomys | Pseudomys |
| Pseudonaja | Pseudonaja |
| Pseudonaja textilis | Eastern brown snake |
| pseudonyme | alias |
| Pseudophyllidea | Pseudophyllidea |
| Pseudorchis albida | Pseudorchis albida |
| Pseudoryzomys | Brazilian False Rice Rat |
| Pseudoscalaire | Pseudoscalar |
| Pseudotriakidae | False catshark |
| Pseudotriakis | False catshark |
| Pseudotriton montanus | Mud Salamander |
| Pseudotropheus | Pseudotropheus |
| Pseudotsuga | Douglas-fir |
| Pseudovecteur | Pseudovector |
| Psi | Psi |
| Psikhushka | Psikhushka |
| Psilocybe | Psilocybe |
| Psilocybe cubensis | Psilocybe cubensis |
| Psilocybe cyanescens | Psilocybe cyanescens |
| Psilocybe mexicana | Psilocybe mexicana |
| Psilocybe semilanceata | Psilocybe semilanceata |
| Psilophyta | Psilotales |
| Psilotum | Psilotum |
| Psiloxylaceae | Psiloxylon |
| Psion | Psion |
| Psittacidae | True parrots |
| Psittaciformes | Parrot |
| Psittacinae | Psittacinae |
| psittacose | psittacosis |
| Psittacula | Psittacula |
| Psittacule double-œil | Double-eyed Fig-parrot |
| Pskov | Pskov |
| PSM | PSM |
| PSNR | Peak signal-to-noise ratio |
| Psocoptera | Psocoptera |
| psoriasis | psoriasis |
| Psousennès | Psusennes I |
| Psousennès Ier | Psusennes I |
| Psousennès II | Psusennes II |
| Psousennès III | Psusennes III |
| Psunj | Psunj |
| PSV Eindhoven | PSV Eindhoven |
| psychanalyse | psychoanalysis |
| psychanalyser | psychoanalyze |
| psychanalyste | psychoanalyst |
| psychanalytique | psychoanalytic |
| psychiatre | psychiatrist |
| psychiatrie | psychiatry |
| psychiatrique | psychiatric |
| Psychidae | Bagworm moth |
| psychique | psychic |
