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allantois是什么意思

allantois

美[ə'læntɔɪs]  英[ə'læntɔɪs]
n.  尿膜;尿囊
  形容词:allantoic  名词复数:allantoides

英英释义

Noun
  1. the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
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