Placodermi

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Placodermi \Plac`o*der"mi\, n. pl. [NL., fr. Gr. pla`x, plako`s,
     a tablet + de`rma skin.] (Paleon.)
     An extinct group of fishes, supposed to be ganoids. The body
     and head were covered with large bony plates. See Illust.
     under {Pterichthys}, and {Coccosteus}.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  Placodermi
       n : extinct group of bony-plated fishes with primitive jaws
           [syn: {class Placodermi}]