Breadcrumb Home > Thesaurus > P Synonyms of placoid Find synonyms for: Adjective1. placoid, platelike, planar (vs. cubic) (vs. linear), two-dimensionalusage: as the hard flattened scales of e.g. sharksWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of placoid (Dictionary) ✖ Related Content Daily Word Quiz: temporize Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language