mucoid /ˈmjuːkɔɪd/adjective 2noun 1forms 1 adjective2 •Having the qualities of mucus; resembling mucus.The virgin is released from the mucoid swamp by a water-nymph from under “the glassy cool, translucent wave,” an Apollonian realm of purity, clarity, and vision. — 1990 •Pertaining to, containing, or being mucus. noun1 •Any of a class of mucin-like substances yielding on decomposition a reducing carbohydrate together with some form of proteinaceous matter. formsmucoids