ren·nin /ˈrɛnən/
  高血壓蛋白原□
  ren·nin /ˈrɛnən/ 名詞
  Ren·nin n. Biochem. A milk-clotting enzyme obtained from the true stomach (abomasum) of a suckling calf.  Mol. wt. about 31,000.  Also called chymosin, rennase, and abomasal enzyme. --[Merck Man. 11]
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  rennin
       n : an enzyme that occurs in gastric juice; causes milk to
           coagulate [syn: chymosin]