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mucous membrane

noun [C]
 
/ˌmjuː.kəsˈmem.breɪn/ specialized

Definition

the thin skin that covers the inside surface of parts of the body such as the nose and mouth and produces mucus to protect themSubstances and structures in the body
(Definition of mucous membrane noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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