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heparin
hep·a·rin [ héppərin ]


noun 
Definition:
 
natural blood-clot preventative: an anticlotting agent present in the body. Use: produced synthetically to treat thrombosis.
[Early 20th century. < obsolete hepar "sulfur compound," via late Latin< Greek hēpar "liver (the organ)"]

hep·a·rin·oid [ héppəri nòyd ] adjective
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