/ Thesaurus / T Synonyms of thoracic duct Find synonyms for: Noun1. thoracic duct, lymph vessel, lymphatic vesselusage: the major duct of the lymphatic systemWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language