heparin has definitions from the fields of chemistry,medicine,pharmacology
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[ noun ] (chemistry,medicine,pharmacology) a polysaccharide produced in basophils (especially in the lung and liver) that inhibits the activity of thrombin in coagulation of the blood; heparin sodium (trade names Lipo-Hepin, Liquaemin) is used as an anticoagulant in the treatment of thrombosis
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