/ Thesaurus / O Synonyms of order pectinibranchia Find synonyms for: Noun1. Pectinibranchia, order Pectinibranchia, animal orderusage: large order of gastropods comprising univalve mollusks that have a single gill resembling a combWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language