Thrombus (noun)

A blood clot that forms within a blood vessel and can obstruct the flow of blood.

Origin:

The word thrombus comes from the greek word "thrombos" meaning "clot".

Examples:

1. Thrombus formation can occur in veins or arteries and can cause serious health problems.
2. A thrombus in the heart can cause a heart attack.
3. A thrombus in the brain can cause a stroke.
4. A thrombus in the legs can cause deep vein thrombosis.
5. Thrombus formation can be caused by conditions such as atrial fibrillation, injury, or surgery.