from The Century Dictionary.
- noun In biology, an organic being which exhibits atavism.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
geneticcharacteristic emerging after absence from several generations.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an organism that has the characteristics of a more primitive type of that organism
Sorry, no etymologies found.
Your smug authorship style is intended to impart upon me that you know it all, I am just an atavist fool.
Conservatives are to busy going to work and making sinful profits to spend time at a conference to learn how to become a better online atavist.
"It's a mistake to think that privacy is an individualist or atavist right," Rotenberg said.
An atavist of the days of blind chivalry he was, a knight errant in the somber clothes of a fanatic.
He could be an atavist, a victim of unconscious regression.
It puts to death with the same ruthless equality the prophet and the atavist.
Of two hundred seeds one became a blue atavist, or rather vicinist, while all others remained true to the white type.
 Relating to old or established pattern; habitual, ingrained  (as a noun) an atavist is a genetic characteristic emerging after absence from several generations (see Wikipedia entry for a more detailed explanation).
But Jesse Helms was so rooted in his atavist traditions, he chose to remain true to his misogyny rather than pose for cameras with faux female golfing partners.
These observations suggest that the primordial IMPDH used the Thr321 pathway exclusively, and elimination of the Arg418 pathway by mutation of modern IMPDH creates an enzymatic atavist.