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Medical Definition of Mucous plug
1. A mass of mucus and cells filling the cervical canal between periods or during pregnancy; a mass of mucous occluding a main or lobar bronchus. (05 Mar 2000)
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1. A mass of mucus and cells filling the cervical canal between periods or during pregnancy; a mass of mucous occluding a main or lobar bronchus. (05 Mar 2000)