Noun class placodermi has 1 sense
  1. Placodermi, class Placodermi - extinct group of bony-plated fishes with primitive jaws
    --1 is a kind of class
    --1 is a member of
     Vertebrata, subphylum Vertebrata, Craniata, subphylum Craniata
    --1 has members: placoderm
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