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 • Syn: Lipo-Hepin, Liquaemin • Hypernyms: polysaccharide, polyose, anticoagulant, anticoagulant medication, decoagulant