Pronunciation: (throm"bu-plas'tin), [key]
1. Biochem.a lipoprotein in the blood that converts prothrombin to thrombin.
2. Pharm.a commercial form of this substance, obtained from the brains of cattle, used chiefly as a local hemostatic and as a laboratory reagent in blood prothrombin tests. Also called throm•bo•ki•nase Pronunciation: (throm"bō-kī'nās, -kin'ās). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.