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English definition of “mucous membrane”

mucous membrane

noun [C] uk   /ˌmjuː.kəs ˈmem.breɪn/ specialized us  
the thin skin that covers the inside surface of parts of the body such as the nose and mouth and produces mucus to protect them
(Definition of mucous membrane from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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