clot (clots plural & 3rd person present) (clotting present participle) (clotted past tense & past participle )
1 n-count A clot is a sticky lump that forms when blood dries up or becomes thick.
He needed emergency surgery to remove a blood clot from his brain.
2 verb When blood clots, it becomes thick and forms a lump.
The patient's blood refused to clot... V
Aspirin apparently thins the blood and inhibits clotting. V-ing