Breadcrumb Home > Thesaurus > P Synonyms of placoderm Find synonyms for: Noun 1. placoderm, aquatic vertebrate usage: fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of placoderm (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: quisling Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language