胶原质
Collagen \Col"la*gen\, n. [Gr. ko`lla glue + -gen.] (Physiol. Chem.) The chemical basis of ordinary connective tissue, as of tendons or sinews and of bone. On being boiled in water it becomes gelatin or glue.
collagen n : a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling