/ Thesaurus / I Synonyms of isotopic Find synonyms for: Adjective1. isotopicusage: of or relating to or having the relation of an isotopeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language