| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024os•tra•co•derm (os′trə kō dûrm′),USA pronunciation n. - Paleontologyany of several extinct jawless fishes of the Ordovician, Silurian, and Devonian periods, having the body enclosed in an armor of bony plates.
- Greek ostrakódermos with a shell, equivalent. to óstrako(n) shell, tile + -dermos -derm
- Neo-Latin Ostracodermi, plural ofOstracodermus
- 1890–95
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