Placoderm

[plækәd:m]

Definition

(noun.) 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.

Typist: Vivienne--From WordNet

Definition

(n.) One of the Placodermi.

Typist: Ollie

Definition

adj. noting an order of fossil fishes having their skin covered with bony plates.

Edited by Flo