See Also: placoderm(medicine)
placoderm(dictionary)

placoderm (iou)



placoderm noun & adjective. M19.
[from Greek plak-, plax tablet, flat plate + -O- + Greek derma skin.]
Palaeontology.
A. noun. A (fossil) fish of the Palaeozoic order Placodermata or Placodermi, having the skin of head and pectoral region encased in broad flat bony plates. M19.
b. adjective. Of or pertaining to the order Placodermata or Placodermi. E20.