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]