| Term | Definition | Contributor | Modified |
|---|---|---|---|
| AM Herculis stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| AM Herculis stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Amianthus | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Amic acids | No definition provided | Christopher Rauch | 2023.12.01 |
| Amicite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Amido-benzene | No definition provided | Christopher Rauch | 2023.12.01 |
| Amiens, Battle of 1870 | No definition provided | Christopher Rauch | 2023.12.01 |
| am index | A mean, 3-hourly ”equivalent amplitude” of geomagnetic activity based on standardized K index data from a global network of 23 Northern and Southern Hemisphere stations by the lnstitut de Physique du Globe de Paris, France; am values are given in units of 1 nT. | Ryan McGranaghan | 2023.04.16 |
| Am index | The daily Ak index determined from the eight daily am indexes. | Ryan McGranaghan | 2023.04.16 |
| Amines | No definition provided | Christopher Rauch | 2023.12.01 |
| Aminoffite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Amiscogging Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Amistad (Schooner) | No definition provided | Christopher Rauch | 2023.12.01 |
| Ammeter | No definition provided | Christopher Rauch | 2023.12.01 |
| ammonia | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Ammonia | No definition provided | Christopher Rauch | 2023.12.01 |
| Ammonia alum | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Ammonian arcanite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Ammonia, Physiological effect of | No definition provided | Christopher Rauch | 2023.12.01 |
| Ammonia--Toxicology | No definition provided | Christopher Rauch | 2023.12.01 |