/ Thesaurus / G Synonyms of genus protoavis Find synonyms for: Noun1. genus Protoavis, bird genususage: extinct primitive birds of the Triassic period; 70 million years before archaeopteryxWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language