throwback(noun, adjective) adjective1. characteristic of an atavistSimilar word(s): regressive, atavistic noun1. an organism that has the characteristics of a more primitive type of that organismSimilar word(s): atavistDefinition categories: person, being, organism2. a reappearance of an earlier characteristicSimilar word(s): atavism, reversionDefinition categories: event, recurrence, return