/ Thesaurus / T Synonyms of trilliaceae Find synonyms for: Noun1. Trilliaceae, family Trilliaceae, trillium family, liliid monocot familyusage: small family of herbs having flowers with 3 petals and 3 sepals; in some classification systems considered a subfamily of the LiliaceaeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language