1 Definition of thrombus

Meaning of thrombus: A blood clot that forms on the wall of a blood vessel or in the heart when blood platelets, proteins, and cells stick together.

A blood clot that forms on the wall of a blood vessel or in the heart when blood platelets, proteins, and cells stick together. A thrombus may block the flow of blood.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.