os·se·in /ˈɑsiən/
  骨,骨膠原
  os·se·in /ˈɑsɪən/ 名詞
  骨膠原
  Os·se·in n.  Physiol. Chem. The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; bone collagen; -- called also ostein.  Chemically it is the same as collagen.
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