Definition of “amnion” - English Dictionary

“amnion” in British English

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amnionnoun [ C ]

us uk /ˈæən/ plural amnions or amnia uk // us specialized

a bag made of thin skin that contains amniotic fluid and surrounds the embryo of a mammal, bird, or reptile inside its mother

adjective uk /ˌæm.niˈɒt.ɪk/ us /-ˈɑː.t̬ɪk/

(Definition of “amnion” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)