Thrombosis is the formation of a mass of aggregated blood factors (a thrombus, or blood clot); coagulation of the blood. Specifically, this refers to the formation of a blood clot that blocks a blood vessel.

From the BioTech Dictionary at For further information see the BioTech homenode.

Throm*bo"sis (?), n. [NL. See Thrombus.] Med.

The obstruction of a blood vessel by a clot formed at the site of obstruction; -- distinguished from embolism, which is produced by a clot or foreign body brought from a distance.

-- Throm*bot"ic (#), a.


© Webster 1913.

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