/ Thesaurus / S Synonyms of subclass entomostraca Find synonyms for: Noun1. Entomostraca, subclass Entomostraca, classusage: in some older classifications includes the Branchiopoda and Copepoda and Ostracoda and Cirripedia; no longer in technical useWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language