NCIt definition : Linear polysaccharides composed of disaccharide repeating units of glycosamine-glycans,
two monosaccharide units (hexosamine and the repeating disaccharide of either hexuronate
or galactose) located on the surface of cells or in the extracellular matrix contributing
to adhesion, elasticity, and viscosity of extracellular substances.;
Alternative definition : NCI-GLOSS: A type of long, unbranched polysaccharide molecule. Glycosaminoglycans
are major structural components of cartilage and are also found in the cornea of the
eye.;