NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,957 terms related to cancer and medicine.
- blood clot
- listen (blud klot)
- A mass of blood that forms when blood platelets, proteins, and cells stick together. When a blood clot is attached to the wall of a blood vessel, it is called a thrombus. When it moves through the bloodstream and blocks the flow of blood in another part of the body, it is called an embolus.