单词 | blastoderm |
释义 | Word Frequency blastoderm(ˈblæstəʊˌdɜːm) noun embryology Also called: blastodisc1. the layer of cells that surrounds the blastocoel of a blastula 2. a flat disc of cells formed after cleavage in a heavily yolked egg, such as a bird's egg Derived forms blastodermic (ˌblastoˈdermic) adjective |
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