尿囊,哺乳动物、鸟类和爬行动物胚胎消化道中形成的具有多种功能的囊。
allantoises — plural of allantois
尿囊,哺乳动物、鸟类和爬行动物胚胎消化道中形成的具有多种功能的囊。；尿囊；[医] 尿囊
尿囊,哺乳动物、鸟类和爬行动物胚胎消化道中形成的具有多种功能的囊。
A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles.
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