tissue plasminogen activator

noun

, Biochemistry.

1. an anticlotting enzyme, naturally occurring in small amounts in the blood.
2. Pharmacology. the same enzyme, produced in large amounts by genetic engineering techniques for use in dissolving blood clots. : TPA

tissue plasminogen activator

1. An enzyme that dissolves blood clots. It can be produced naturally by cells in the walls of blood vessels, or prepared through the use of genetic engineering. Tissue plasminogen activator is used in the coronary arteries during heart attacks and in the cranial arteries in certain types of strokes.