Wiktionary
atavistically
adv. In an atavistic manner.
Usage examples of "atavistically".
Besides Hal, who's atavistically dark-complected anyway, the ones here with the least bad piebald coloring are the players who can tolerate spraying themselves down with Lemon Pledge before outdoor play.
The Ganymedan moravec was tall, elegant as all Ganymedans, atavistically humanoid, sheathed in black buckycarbon and staring through his fly’s eyes.
Now he sees that he has become atavistically hairy, and his beard glints, because it is shot through with grey hairs.