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福克斯词典 \ 英汉词典 \

exochorion是什么意思？

exochorion

英[ˌeksəʊ'kɔ:rɪɒn] 美[ˌeksoʊ'kɒrɪɒn]

n. （高级脊椎动物的）绒毛膜表层，（昆虫的）外卵壳；

行业词典

医学：绒〔毛〕膜外层：绒膜来自外胚层的部分，有些种属的动物，胚外膜系由摺叠而成；
昆虫学：外卵壳；外卵殼；

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