an obsolete term applied to carbohydrate-protein compounds present in a variety of biological matter, such as egg white, cornea, cartilage, vitelline membranes of amphibian and invertebrate eggs, synovia of the joints, secretions of the salivary glands, ovarian cysts, and blood plasma. In view of their chemical structure, it has been suggested that mucoids be called mucopolysaccharides or glycoproteins.