/ Thesaurus / G Synonyms of germ tube Find synonyms for: Noun1. germ tube, plant part, plant structureusage: (botany) a slender tubular outgrowth from a spore in germinationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language