/ Thesaurus / S Synonyms of sieve tube Find synonyms for: Noun1. sieve tube, vascular tissueusage: tube formed by cells joined end-to-end through which nutrients flow in flowering plants and brown algaeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language