| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Argutite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Argyrodite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Arhbarite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Arianism | No definition provided | Christopher Rauch | 2023.12.01 |
| Aricite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Arickara Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Arickaree Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| arid | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Aridae | No definition provided | Christopher Rauch | 2023.12.01 |
| arid climate | No definition provided | Ryan McGranaghan | 2023.04.16 |
| aridification | No definition provided | Ryan McGranaghan | 2023.04.16 |
| aridisol | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Ariège, France (Dept.) | No definition provided | Christopher Rauch | 2023.12.01 |
| Ariel | The fourth-largest moon of Uranus. | Ryan McGranaghan | 2023.04.16 |
| Arikara hymns | No definition provided | Christopher Rauch | 2023.12.01 |
| Arikara Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Arikara language | No definition provided | Christopher Rauch | 2023.12.01 |
| Arikare Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Aristarainite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Aristocracy | No definition provided | Christopher Rauch | 2023.12.01 |