Anat. [mod.L., fem. (sc. membrāna) of submūcōsus: see next.] The layer of areolar tissue lying beneath a mucous membrane; the submucous layer.
1885. Klein, Micro-Org., 88. The submucosa of the inflamed Peyer’s glands of the small intestine.
So Submucosal a., = SUBMUCOUS 2 a (1913 Dorland, Illustr. Med. Dict.).
