mucin mucilaginousness • mucinogen · · · Info · Definitions · Characters · · mucin · · Text Latin · · Script 5 · · Length 2 · · Syllables Definitions · · · (noun) a nitrogenous substance found in mucous secretions; a lubricant that protects body surfaces. · · Noun Definition 1 Characters · · c latin small letter c U+0063 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E u latin small letter u U+0075