thrombus
noun
throm·bus ˈthräm-bəs 
plural thrombi ˈthräm-ˌbī -ˌbē
-ˌbē
: a clot of blood formed within a blood vessel and remaining attached to its place of origin
compare embolus
Examples of thrombus in a Sentence
Recent Examples on the Web
During an angioplasty, a procedure developed in the 1980s, heart doctors would place a balloon made of flexible polymers inside an artery to open up and clear the thrombus. —
William Cornwell, The Conversation, 19 Nov. 2025 Current treatments for stroke patients often involve injectable drugs that dissolve a blockage in the blood vessel called a thrombus. —Andrew Paul, Popular Science, 13 Nov. 2025 The medical examiner’s office concluded that the death in April of a woman in sheriff’s office custody was caused by a coronary thrombus, or blood clot, due to atherosclerotic and hypertensive cardiovascular disease. —Emerson Clarridge, Fort Worth Star-Telegram, 26 Aug. 2025 The clot, or thrombus, is made of fibrin, platelets, white blood cells and some red blood cells. —Daryl Austin, USA Today, 15 Aug. 2025 About nine out of 10 cats with saddle thrombus have heart disease, though most of them do not show outward signs of it before the clot forms. —Maria Azzurra Volpe, MSNBC Newsweek, 9 July 2025 After fibrin formation has occurred, a clot (thrombus) develops.3 This complex process can take seconds to two hours.1 2. —Michael Menna, Verywell Health, 17 Jan. 2025 The manner of Guild’s death was natural and the causes were pulmonary thromboembolus, a blood clot in the lung, and a thrombus in the left popliteal vein, a vein in the leg, according to the coroner. —Matt Sledge, NOLA.com, 18 Oct. 2020
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
William Cornwell, The Conversation, 19 Nov. 2025 Current treatments for stroke patients often involve injectable drugs that dissolve a blockage in the blood vessel called a thrombus. —Andrew Paul, Popular Science, 13 Nov. 2025 The medical examiner’s office concluded that the death in April of a woman in sheriff’s office custody was caused by a coronary thrombus, or blood clot, due to atherosclerotic and hypertensive cardiovascular disease. —Emerson Clarridge, Fort Worth Star-Telegram, 26 Aug. 2025 The clot, or thrombus, is made of fibrin, platelets, white blood cells and some red blood cells. —Daryl Austin, USA Today, 15 Aug. 2025 About nine out of 10 cats with saddle thrombus have heart disease, though most of them do not show outward signs of it before the clot forms. —Maria Azzurra Volpe, MSNBC Newsweek, 9 July 2025 After fibrin formation has occurred, a clot (thrombus) develops.3 This complex process can take seconds to two hours.1 2. —Michael Menna, Verywell Health, 17 Jan. 2025 The manner of Guild’s death was natural and the causes were pulmonary thromboembolus, a blood clot in the lung, and a thrombus in the left popliteal vein, a vein in the leg, according to the coroner. —Matt Sledge, NOLA.com, 18 Oct. 2020
Cite this Entry
“Thrombus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.grautoblog.com/dictionary/thrombus. Accessed 29 Apr. 2026.
Copy CitationKids Definition
thrombus
noun
throm·bus ˈthräm-bəs
plural thrombi -ˌbī
-ˌbē
: a clot of blood formed within a blood vessel and remaining attached to its place of origin
compare embolus
Medical Definition
thrombus
noun
throm·bus ˈthräm-bəs
: a clot of blood formed within a blood vessel and remaining attached to its place of origin
compare embolus
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