/ Dictionary / Index S submucosa: Meaning and Definition of Find definitions for: sub•mu•co•sa Pronunciation: (sub"my-kō'su, -zu), [key] — n. Anat. the layer of connective tissue located beneath the mucous membrane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: submucosa (Thesaurus) submontane submultiple Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language