ostracoderm

/ˈɑstrəkoʊˌdʌrm/
IPA guide

Other forms: ostracoderms

Definitions of ostracoderm
  1. noun
    extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
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    type of:
    agnathan, jawless fish, jawless vertebrate
    eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
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