Definition of Placoderm in English :
Define Placoderm in English
Placoderm meaning in English
Meaning of Placoderm in English
Pronunciation of Placoderm in English
Placoderm pronunciation in English
Pronounce Placoderm in English
Placoderm
see synonyms of placodermNoun
1. placoderm
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 Lexical Database for English. Princeton University. 2010.
Placoderm
see synonyms of placodermnoun
any extinct bony-plated fishlike vertebrate of the class Placodermi, of Silurian to Permian times: thought to have been the earliest vertebrates with jaws
Collins English Dictionary. Copyright © HarperCollins Publishers
Placoderm
see synonyms of placodermn.
Any of various extinct jawed fishes of the group Placodermi of the Silurian and Devonian Periods, having bony plates of armor covering the head and thorax. Placoderms were among the first jawed vertebrates.
The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.