Found 2 items, similar to Placoderm.
English → English (WordNet)
Definition: placoderm
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
English → English (gcide)
Definition: Placoderm
Placoderm
\Plac"o*derm\, n. [Gr. pla`x, plako`s, tablet + de`rma
skin.] (Paleon.)
One of the Placodermi.
[1913 Webster]