| Antibiose | antibiosis |
| Antibiont | antibiont |
| Antigone | Antigone |
| Antilope | antelope |
| Antipode | antipode |
| Antithese | antithesis |
| Abiose | abiosis |
| Endobiose | endobiosis |
| Anhidrose | anhidrosis |
| Antinomie | antinomy |
| Antiochos | Antiochus |
| Antiphrase | antiphrasis |
| Antivirus | antivirus |
| Antonius | Antonius |
| Antichrese | antichresis |
| Antidot | antidote |
| Antifon | antiphon |
| Antike | antiquity ancient world |
| Antimon | antimony |
| Mantisse | mantissa |