placoderm, n.
(placoderms)
(placoderms)
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
<noun.animal>
placoderm
Word
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
<noun.animal>
placoderm