/ Thesaurus / G Synonyms of genus psittacosaurus Find synonyms for: Noun1. genus Psittacosaurus, reptile genususage: most primitive genus of horned dinosaurs; early CretaceousWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language