mucosa

from WordNet (r) 3.0 (2006)

mucosa
    n 1: mucus-secreting membrane lining all body cavities or
         passages that communicate with the exterior [syn: {mucous
         membrane}, {mucosa}]

from The Collaborative International Dictionary of English v.0.48

mucosa \mucosa\ n.
   The mucus-secreting membrane lining all body cavities or
   passages that communicate with the exterior; called also
   {mucous membrane}.

   Syn: mucous membrane.
        [WordNet 1.5]