Definitions for placodermi
  • Placodermi (n. pl.) - 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.
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ad ae ai al am ar de do ed el em er id la li lo ma me mi mo od oe oi om op or pa pe pi re