/ Thesaurus / O Synonyms of order euphausiacea Find synonyms for: Noun1. Euphausiacea, order Euphausiacea, animal orderusage: small commonly luminescent crustaceans; important element of marine plankton: krillWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language