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• HEPARIN (noun) The noun HEPARIN has 1 sense: 1. 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 Familiarity information: HEPARIN used as a noun is very rare.
