• (n.) The chemical basis of cartilage, converted by long boiling in water into a gelatinous body called chondrin.
Chon'dri·gen noun [ Greek ... cartilage + -gen .] (Physiol. Chem.) The chemical basis of cartilage, converted by long boiling in water into a gelatinous body called chondrin. 
chondrigen, chondrogen The basal substance of cartilage and corneal tissue, which turns into chondrin when boiled