/ Thesaurus / P Synonyms of plectognath fish Find synonyms for: Noun1. plectognath, plectognath fish, spiny-finned fish, acanthopterygianusage: tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spinesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: respite Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language