Breadcrumb Home > Thesaurus > C Synonyms of cnidarian Find synonyms for: Noun 1. coelenterate, cnidarian, invertebrate usage: radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cnidarian (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: terraincognita Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language