Ostracoderm (noun) Definition, Meaning & Examples

noun
  1. any of several extinct jawless fishes of the Ordovician, Silurian, and Devonian periods, having the body enclosed in an armor of bony plates.
noun
  1. any extinct Palaeozoic fishlike jawless vertebrate of the group Ostracodermi, characterized by a heavily armoured body
    Ostracoderm (noun) Definition, Meaning & Examples

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