| Term | Definition | Contributor | Modified |
|---|---|---|---|
| O subdwarf stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O subdwarf stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O subgiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O subgiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O subgiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Osumilite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Osumilite (Fe) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Osumilite (Mg) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| O supergiant stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Oswaldpeetersite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Oswego (Ship) | No definition provided | Christopher Rauch | 2023.12.01 |
| Otaria | No definition provided | Christopher Rauch | 2023.12.01 |
| Otavite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Other | Not classified with more specific terms. Thecontext of its usage may be described in related text. | Ryan McGranaghan | 2023.04.16 |
| Other | No definition provided | Ryan McGranaghan | 2023.04.16 |
| OtherDefinitions | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Otiananiche | No definition provided | Christopher Rauch | 2023.12.01 |