/ Thesaurus / T Synonyms of triphosphoric acid Find synonyms for: Noun1. triphosphoric acid, acidusage: an acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and estersWordNet 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