Wiktionary
mucoprotein
n. (context biochemistry English) Any of a group of widely-distributed natural compounds that exist as complexes of proteins with mucopolysaccharides
Wikipedia
Mucoprotein
A mucoprotein is a glycoprotein composed primarily of mucopolysaccharides. Mucoproteins can be found throughout the body, including the gastrointestinal tract, reproductive organs, airways, and the synovial fluid of the knees.