What is 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 called?

thrombosis — 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's 1913.)

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