heparin

n. polysaccharide acid found in certain body tissues and organs and used in medicine as an anti-coagulant

Heparin, a highly sulfated glycosaminoglycan is widely used as an injectable anticoagulant and has the highest negative charge density of any known biological molecule. It can also be used to form an inner anticoagulant surface on various experimental and medical devices such as test tubes and renal dialysis machines. Pharmaceutical grade heparin is commonly derived from mucosal tissues of slaughtered meat animals such as porcine intestine or bovine lung.
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Heparin /hep·a·rin/ a sulfated glycosaminoglycan of mixed composition, released by mast cells and by blood basophils in many tissues, especially the [more]Heparin - Community and Resources

Noun
1. a polysaccharide produced in basophils (especially in the lung and liver) and that inhibit the activity of thrombin in coagulation of the blood; heparin sodium (trade names Lipo-Hepin and Liquaemin) is used as an anticoagulant in the treatment of thrombosis and in heart surgery
(synonym) Lipo-Hepin, Liquaemin
(hypernym) polysaccharide, polyose

n. hepar, chemical compound containing sulphur and an alkali