allantois [i ql2ntouis, `tCis ]    (¼øÀ§: 17338 - ´ëÁ¹ ¼öÁØ)  
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Mean A membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles.
ÆÄ»ý¾î allantoic  [Çü]
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