This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. of the recurrence of a trait reappearing after an absence of one or more generations due to a chance recombination of genes.

adj. of a throwback or exhibiting primitivism.

adj. relating to earlier, more primitive behavior that returns after an absence.

adj. displaying characteristics of a previous cultural era or of a previous ancestral form; displaying atavism.

Pertaining to or characterized by atavism; atavic.

adj. characteristic of an atavist

"But it divides between those whose feelings might be termed atavistic or revanchist and those who make a reasoned critique, in sorrow as much as anger, of Western policies - especially the Iraq war, the Kosovo affair from 1999 onwards, United States plans for theatre missile-defence, and, not least, the expansion of NATO."

regressive   

atavist    atavism   

atavistically   

atavic    throwback(prenominal)   

visceral    animalistic    instinctual    unreasoned    primal    premonitory    uncontrollable    unreasoning    deep-seated    fight-or-flight