| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Obstetrics--Cases, clinical reports, statistics | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics, Eclectic | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics, Homeopathic | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics--Hospitals | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics--Jurisprudence | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics--Surgery | No definition provided | Christopher Rauch | 2023.12.01 |
| Obstetrics--Tables, etc | No definition provided | Christopher Rauch | 2023.12.01 |
| OBS_Title | Observational title | Ryan McGranaghan | 2023.04.16 |
| obstruction | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OB supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OB supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OB supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OB supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OBS_WavelUnit | Unit of OBS_MeanWavel (preferably "Angstroms") | Ryan McGranaghan | 2023.04.16 |
| obukhov length | No definition provided | Ryan McGranaghan | 2023.04.16 |
| occasional | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Occipital bone | No definition provided | Christopher Rauch | 2023.12.01 |
| occluded front | A front that forms as a cyclone moves deeper into colder air. | Ryan McGranaghan | 2023.04.16 |
| Occlusion | No definition provided | Christopher Rauch | 2023.12.01 |
| Occultation | The blocking of light from an astronomical object, such as a star, by another object, such as the Moon or an asteroid, that passes in front of it. Also, the period of time for which this blocking take s place. A solar eclipse is a particular case of occultation. Determining the moment of stellar occultation by the Moon is used to improve our knowledge of the lunar orbit. Moreover, the occultation of stars by asteroids or planetary satellites provide important data for better measuring the sizes of the occulting bodies. | Ryan McGranaghan | 2023.04.16 |