os•tra•co•derm
We found 2 definitions of ostracoderm from 2 different sources.
NounPlural: ostracoderms |
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ostracoderm - extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic | ||
agnathan, jawless fish, jawless vertebrate eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms |