1. a viscous mucopolysaccharide found in the connective tissue space and the synovial fluid of movable joints and the humors of the eye; a cementing and protective substance;
WordNet (r) 3.0 (2006):
hyaluronic acid
n 1: a viscous mucopolysaccharide found in the connective tissue
space and the synovial fluid of movable joints and the
humors of the eye; a cementing and protective substance