英语词汇“ostracoderm”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	ostracoderm
释义	os·tra·co·derm (ŏstrə-kŏ-dûrm′) n. Any of various extinct primitive jawless fishes of the Ordovician through the Devonian periods, having bodies encased in an armor of bony plates. [Greek ostrakon, shell; see ost- in the Appendix of Indo-European roots + -DERM.]
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