col·la·gen /ˈkɑləʤən/
  膠原質
  col·la·gen /ˈkɑləʤən/ 名詞
  Col·la·gen n.  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.
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  collagen
       n : a fibrous scleroprotein in bone and cartilage and tendon and
           other connective tissue; yields gelatin on boiling