ostracoderm
/os-truh-koh-durm/US // ˈɒs trə koʊˌdɜrm //UK // (ˈɒstrəkəˌdɜːm, ɒsˈtrækə-) //
排泄物,表皮细胞,腹腔镜,腹腔镜手术
Definitions
n.名词 noun
- 1
- : any of several extinct jawless fishes of the Ordovician, Silurian, and Devonian periods, having the body enclosed in an armor of bony plates.
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