Definitions for: Placoderm


[n] fishlike vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws



Webster (1913) Definition: Plac"o*derm, n. [Gr. ?, ?, tablet + ? skin.]
(Paleon.)
One of the Placodermi.

See Also: aquatic vertebrate, class Placodermi, Placodermi

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