- a fibrinous clot that forms in and obstructs a blood vessel, or that forms in one of the chambers of the heart.
Origin of thrombus
1685–95; < New Latin < Greek thrómbos clot, lump
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for thrombi
The thrombi grow by accretion in the direction of the heart.
Thrombi, in some instances, soften in their centers, and are then observed to contain a puslike substance.Special Report on Diseases of the Horse
United States Department of Agriculture
Thrombi from dilatation are met with both in dilated arteries and veins.
The danger of this is greatly increased by infection, which breaks down the thrombi in the veins and arteries.Surgery, with Special Reference to Podiatry
Thrombi from compression are frequently formed in veins, in the vicinity of growing tumors.
- a clot of coagulated blood that forms within a blood vessel or inside the heart and remains at the site of its formation, often impeding the flow of bloodCompare embolus
C17: from New Latin, from Greek thrombos lump, of obscure origin
Word Origin and History for thrombi
1690s, Modern Latin, from Greek thrombos "lump, piece, clot of blood, curd of milk."
Online Etymology Dictionary, © 2010 Douglas Harper
- A fibrinous clot formed in a blood vessel or in a chamber of the heart.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A clot consisting of fibrin, platelets, red blood cells, and white blood cells that forms in a blood vessel or in a chamber of the heart and can obstruct blood flow. The rupture of atherosclerotic plaques can cause arterial thrombosis (the formation of thrombi), while tissue injury, decreased movement, oral contraceptives, prosthetic heart valves, and various metabolic disorders increase the risk for venous thrombosis. A thrombus in a coronary artery can cause a heart attack. Compare embolus.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.