ostracoderm
ostracoderm
[ɒˈstrakədəːm]
noun
[ɒˈstrakədəːm]
noun
- an early fossil jawless fish of the Cambrian to Devonian periods, having a heavily armoured body
甲胄鱼 - Class Agnatha: several orders
无颌纲： 数目
- late 19th cent.: from modern Latin Ostracodermi (former taxonomic name), from Greek ostrakon 'shell' + derma 'skin'
考试词汇表
