throm·​bo·​sis | \ thräm-ˈbō-səs How to pronounce thrombosis (audio) , thrəm- \
plural thromboses\ thräm-​ˈbō-​ˌsēz How to pronounce thrombosis (audio) , thrəm-​ \

Definition of thrombosis

: the formation or presence of a blood clot within a blood vessel

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Other Words from thrombosis

thrombotic \ thräm-​ˈbä-​tik How to pronounce thrombosis (audio) , thrəm-​ \ adjective

Examples of thrombosis in a Sentence

Recent Examples on the Web The woman, who was in her late 30s, was vaccinated on August 26 and died on September 7 from thrombosis with thrombocytopenia syndrome, known as TTS. Jamie Gumbrecht, CNN, 5 Oct. 2021 In April, the FDA added a safety warning, saying there's an association with rare reports of thrombosis-thrombocytopenia syndrome following vaccination. Kristen Jordan Shamus, Detroit Free Press, 19 Sep. 2021 There were two cases of the rare clotting disorder thrombocytopenia thrombosis syndrome among participants, with both making a complete recovery, Gray said. Time, 6 Aug. 2021 Despite two positive Covid-19 tests, the death certificate listed her cause of death as pulmonary thrombosis. New York Times, 17 Aug. 2021 To qualify for the diagnosis, someone must have a blood clot, known as a thrombosis, in an uncommon location, such as the brain, as well as low levels of platelets in their blood, a condition known as thrombocytopenia. Elinor Aspegren, USA TODAY, 13 May 2021 In addition to a rare blood clot known as cerebral venous sinus thrombosis, the six women all developed low platelets, or thrombocytopenia. Shari Rudavsky, The Indianapolis Star, 13 Apr. 2021 Germany has reported cerebral venous thrombosis (CVT), an unusual type of stroke that is characteristic of TTS, in roughly one in 76,000 recipients of the vaccine. Kai Kupferschmidt, Science | AAAS, 3 May 2021 The researchers found that the risk of cerebral venous thrombosis (CVT) in those who have been infected with the coronavirus is around 100 times greater than normal. Chronicle Staff, San Francisco Chronicle, 25 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thrombosis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of thrombosis

1857, in the meaning defined above

History and Etymology for thrombosis

New Latin, from Greek thrombōsis clotting, from thrombousthai to become clotted, from thrombos clot

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Time Traveler for thrombosis

Time Traveler

The first known use of thrombosis was in 1857

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Statistics for thrombosis

Last Updated

14 Oct 2021

Cite this Entry

“Thrombosis.” Dictionary, Merriam-Webster, Accessed 26 Oct. 2021.

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More Definitions for thrombosis



English Language Learners Definition of thrombosis

: a serious condition caused when a blood clot blocks the flow of blood in a blood vessel


throm·​bo·​sis | \ thräm-ˈbō-səs, thrəm- How to pronounce thrombosis (audio) \
plural thromboses\ -​ˌsēz How to pronounce thrombosis (audio) \

Medical Definition of thrombosis

: the formation or presence of a blood clot within a blood vessel — see coronary thrombosis, deep vein thrombosis

More from Merriam-Webster on thrombosis Encyclopedia article about thrombosis


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