/ Thesaurus / T Synonyms of triceps brachii Find synonyms for: Noun1. triceps brachii, musculus triceps brachii, tricepsusage: the skeletal muscle having three origins that extends the forearm when it contractsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: magnanimous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language