| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Photosphere | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Photosphere | The surface layer of the sun that we can see in the visible light range. | Ryan McGranaghan | 2023.04.16 |
| Photosphere | The atmospheric layer of the Sun or a star from which continuum radiation, especially optical, is emitted to space. For the Sun, the photosphere is about 500 km thick. | Ryan McGranaghan | 2023.04.16 |
| photosynthesis | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Photosynthesis | No definition provided | Ryan McGranaghan | 2023.04.16 |
| photosynthetically active radiation | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Phototelegraphy | No definition provided | Christopher Rauch | 2023.12.01 |
| Photo-therapy | No definition provided | Christopher Rauch | 2023.12.01 |
| Phototherapy | No definition provided | Christopher Rauch | 2023.12.01 |
| Photo-topography | No definition provided | Christopher Rauch | 2023.12.01 |
| Phototopography | No definition provided | Christopher Rauch | 2023.12.01 |
| Photo-tropism | No definition provided | Christopher Rauch | 2023.12.01 |
| Phototropism | No definition provided | Christopher Rauch | 2023.12.01 |
| Phototubes | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Photovisual magnitude | Magnitude defined for the combination of a photographic plate and a yellow filter, approximating the spectral sensitivity of the eye. | Ryan McGranaghan | 2023.04.16 |
| photovoltaic cell | No definition provided | Ryan McGranaghan | 2023.04.16 |
| photovoltaics | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Photo xylography | No definition provided | Christopher Rauch | 2023.12.01 |
| Photo-xylography | No definition provided | Christopher Rauch | 2023.12.01 |
| Photoxylography | No definition provided | Christopher Rauch | 2023.12.01 |