heparin       
noun [ U ]  medical specialized uk/ˈhep.ə.rɪn/ us/ˈhep.ə.rɪn/
 肝素
a drug that stops the blood from getting too thick
  Heparin injections are used to prevent blood clots in people undergoing dialysis and surgery. 肝素注射是用来防止接受透析或手术的患者体内出现血凝块。