| Atavistic 1. (a.) Ancient; belonging to a past era; as, the reappearance on an atavistic trait in a species. Thesaurus Entries aboriginal, ancestral, antepatriarchal, autochthonous, bodily, born, coeval, congenital, connatal, connate, connatural, constitutional, genetic, hereditary, humanoid, in the blood, inborn, inbred, incarnate, indigenous, inherited, innate, instinctive, instinctual, native, native to, natural, natural to, organic, patriarchal, physical, preadamite, preglacial, prehistoric, prehuman, primal, prime, primeval, primitive, primogenial, primoprimitive, primordial, pristine, protohistoric, protohuman, reactionary, recessive, recidivist, recidivous, regressive, retrograde, retrogressive, retrorse, retroverse, returnable, reversible, reversional, reversionary, revertible, revulsionary, temperamental |