/ Thesaurus / A Synonyms of atomic number 43 Find synonyms for: Noun1. technetium, Tc, atomic number 43, metallic element, metalusage: a crystalline metallic element not found in nature; occurs as one of the fission products of uraniumWordNet 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