Top Definition
Having characteristics regressing to a more primitive type; resembling a distant ancestor. A evolutionary throwback.
The atavistic dew claw in many dog breeds is a simple example of a genetic throwback to an earler stage of dog evolution.

An atavistic example in humans is when babies are born with true tails.

by OneBadAsp November 02, 2006
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.