| Protoplasma | protoplasm |
| Protoplanet | protoplanet |
| Ektoplasma | ectoplasm |
| Zytoplasma | cytoplasm |
| protoplanetar | protoplanetary |
| Protolyse | protolysis |
| Neoplasma | neoplasm |
| Mykoplasma | mycoplasma |
| Blutplasma | blood plasma |
| Kaltplasma | cold plasma non thermal plasma |
| Propiska | propiska |
| Protoboard | breadboard |
| Prophase | prophase |
| Propolis | propolis |
| Protologie | protology |
| Protonym | protonym |
| Protosprache | proto-language |
| Prototheria | Prototheria |
| Photolyse | photolysis |
| Photopeak | photopeak |