/ Thesaurus / T Synonyms of tertium quid Find synonyms for: Noun1. tertium quid, opposition, oppositenessusage: some third thing similar to two opposites but distinct from bothWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language