a polysaccharide produced in basophils (especially in the lung and liver) and that inhibits the activity of thrombin in coagulation of the blood; it (trade names Lipo-Hepin and Liquaemin) is used as an anticoagulant in the treatment of thrombosis and in heart surgery
"The surgeon administered a precise dose of heparin to prevent blood clots during the open-heart procedure."
A compound occurring in the liver and other tissues which inhibits blood coagulation. A sulfur-containing polysaccharide, it is used as an anticoagulant in the treatment of thrombosis.
"The doctor ordered a dose of heparin to prevent my leg clot from growing larger while waiting for surgery."