| Word | Definitions | Synonyms |
|---|---|---|
| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
| atavistic | (adjective) characteristic of an atavist | Synonyms: throwback |