from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The formation, presence, or development of a thrombus.

from The Century Dictionary.

  • noun The coagulation of the blood in a blood-vessel or in the heart during life; the formation or existence of a thrombus. See thrombus .

from the GNU version of the Collaborative International Dictionary of English.

  • noun (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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun pathology The formation of thrombi in the blood vessels of a living organism, causing obstruction of the circulation.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel


from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin thrombōsis, from Greek, a clotting, from thrombousthai, to clot, from thrombos, clot.]


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  • It gives me a thrombbing headache!

    July 23, 2009