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chorion n. 絨毛膜,漿膜,蛋殼 絨毛膜,漿膜,蛋殼 chorion n 1: the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals) Chorion \Cho"ri*on\, n. [NL., fr. Gr. ?.]
1. (Anat.) (a) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development. (b) The true skin, or cutis. [1913 Webster] 2. (Bot.) The outer membrane of seeds of plants. [1913 Webster]
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