Meaning of proteoglycan

pro•te•o•gly•can

Pronunciation: (prō"tē-ō-glī'kan), [key]
— n. Biochem.
  1. a macromolecule composed of a polysaccharide joined to a polypeptide and forming the ground substance of connective tissue.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.