n. A layer of connective tissue beneath a mucous membrane
The Century Dictionary and Cyclopedia
n. The layer of areolar tissue underlying a mucous membrane; submucous tissue.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the connective tissue beneath mucous membrane
Word Usage
"Some substances, especially those which are poorly ionized in plasma (such as weak bases), may passively diffuse through the walls of the capillaries, through the intestinal submucosa, and into the intestinal lumen to be eliminated in feces."