/ Thesaurus / C Synonyms of crookes tube Find synonyms for: Noun1. Crookes tube, cathode-ray tube, CRTusage: the original gas-discharge cathode-ray tubeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language