/ Thesaurus / B Synonyms of bos primigenius Find synonyms for: Noun1. aurochs, urus, Bos primigenius, ox, wild oxusage: large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quince Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language