/ Thesaurus / C Synonyms of circular function Find synonyms for: Noun1. trigonometric function, circular function, function, mathematical function, single-valued function, map, mappingusage: function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language