| Term | Definition | Contributor | Modified |
|---|---|---|---|
| prehistoric | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Prehistoric antiquities | No definition provided | Christopher Rauch | 2023.12.01 |
| Prehistoric art | No definition provided | Christopher Rauch | 2023.12.01 |
| Prehistoric man | No definition provided | Christopher Rauch | 2023.12.01 |
| Prehnite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Preisingerite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Preiswerkite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Prejudices | No definition provided | Christopher Rauch | 2023.12.01 |
| Pre-main sequence | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Pre-main sequence stars | A star that evolves in the Hayashi phase and has not yet reached the zero-age main sequence. | Ryan McGranaghan | 2023.04.16 |
| Premier (Ship) | No definition provided | Christopher Rauch | 2023.12.01 |
| Premillennialism | No definition provided | Christopher Rauch | 2023.12.01 |
| Premiums (Prizes, rewards) | No definition provided | Christopher Rauch | 2023.12.01 |
| Premonstrants | No definition provided | Christopher Rauch | 2023.12.01 |
| Premonstrants--Bio-bibl | No definition provided | Christopher Rauch | 2023.12.01 |
| Premonstratensians | No definition provided | Christopher Rauch | 2023.12.01 |
| Prenatal influences | No definition provided | Christopher Rauch | 2023.12.01 |
| Preobrazhenskite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Pre-operational | A product tool or service that has been validated against the criteria for use in the intended operational context but is not yet being demonstrated to meet operational use. | Ryan McGranaghan | 2023.04.16 |
| Preparedness and planning | No definition provided | Ryan McGranaghan | 2023.04.16 |