Synonyms: reversion, atavism, throwback
Definition: a reappearance of an earlier characteristic
Similar words: recurrence, return
Definition: happening again (especially at regular intervals)
Usage: the return of spring
Definition: an organism that has the characteristics of a more primitive type of that organism
Similar words: organism, being
Definition: a living thing that has (or can develop) the ability to act or function independently
Synonyms: atavistic, throwback
Definition: characteristic of an atavist
Similar words: regressive
Definition: opposing progress; returning to a former less advanced state