| Word | Definitions | Synonyms |
|---|---|---|
| astasia | (noun) inability to stand due to muscular incoordination | - |
| astatic | (adjective) not static or stable | - |
| astatine | (noun) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium | Synonyms: At, atomic number 85 |