clot

1 of 2

noun

1
: a portion of a substance adhering together in a thick nondescript mass (as of clay or gum)
2
a
: a roundish viscous lump formed by coagulation of a portion of liquid or by melting
b
: a coagulated mass produced by clotting of blood
3
British : blockhead
4
: cluster, group
a clot of spectators

clot

2 of 2

verb

clotted; clotting

intransitive verb

1
: to become a clot : form clots
2
: to undergo a sequence of complex chemical and physical reactions that results in conversion of fluid blood into a coagulated mass : coagulate

transitive verb

1
: to cause to form into or as if into a clot
2
: to fill with clots
also : clog
clotted streets

Example Sentences

Noun We were told that his stroke was caused by a clot in his brain. a clot of daisies occupied one corner of the flower bed Verb medications that prevent blood from clotting substances that help to clot blood
Recent Examples on the Web
Noun
At highest risk from hormone use are women who have already had a heart attack, breast cancer or a stroke or a blood clot, or women with a cluster of significant health problems. Susan Dominus, New York Times, 1 Feb. 2023 Cox died later that year of an apparent blood clot in December 2019. Audrey Conklin, Fox News, 25 Jan. 2023 An average woman in her 60s might have about a 1% total increase in the combined risk of blood clot, heart disease and cancer, but some women will have higher or lower risks. Dr. Keith Roach, oregonlive, 12 Jan. 2023 Cox died in December 2019 of an apparent blood clot in his lung, The Associated Press reported. NBC News, 20 Apr. 2022 But the combination of the clot-busting drug with lecanemab may have led to the cerebral hemorrhages. Amanda Sealy, CNN, 4 Jan. 2023 Earlier media reports linked lecanemab to two patient deaths, the most recent death involving a woman who suffered a stroke and was administered a clot-busting medication at a Chicago hospital, Science reported. Ken Alltucker, USA TODAY, 30 Nov. 2022 After a successful removal surgery, yet another clot, this one about half the size of a fist, formed the following day, requiring another surgical procedure. Rivea Ruff, Essence, 23 Nov. 2022 Today, more and more people are surviving heart attacks — over 90 percent — thanks in part to clot-busting drugs, angiograms and cardiac care units. Jeanne Erdmann, Discover Magazine, 16 June 2020
Verb
Signs that your cat may have a vitamin deficiency include loss of appetite, poor hair condition, dry and itchy skin, infections of the skin and blood that does not clot properly. Dallas News, 22 Dec. 2022 Sam’s blood, ironically, was clotting too much and therefore unable to clot when actually needed. Julia Michie Bruckner, Discover Magazine, 7 May 2018 When there is a wounded area on the body, the natural response is for platelets in the blood to clot to plug the wound. Amber Smith, Discover Magazine, 18 Oct. 2022 Along with fiber, green beans are a source of folate (important for pregnant women) and vitamin K, which supports bone health and the blood's ability to clot. Cate Geiger Kalus, Country Living, 8 Aug. 2022 In 1951, a person attempting suicide with warfarin recovered fully after treatment with vitamin K, and doctors realized that this drug used in low doses might be effective for people with a tendency to clot too much. Dr. Keith Roach, oregonlive, 6 July 2022 Deputies treated the boy’s stab wound with hemostatic gauze, which is designed to help quickly clot and stop bleeding, until paramedics arrived and took him to a San Diego hospital, Lizarraga said. Alex Riggins, San Diego Union-Tribune, 1 June 2022 And each day their spongy interior, the marrow, churns out hundreds of billions of blood cells — which carry oxygen, fight infections and clot the blood in wounds — as well as other cells that make up cartilage and fat. Amber Dance, Smithsonian Magazine, 3 Mar. 2022 About one in 5,000 males are diagnosed with the blood disorder in which blood does not clot in a typical way, according to the Centers for Disease Control and Prevention. Kyle Neddenriep, The Indianapolis Star, 24 Feb. 2022 See More

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

Word History

Etymology

Noun

Middle English, from Old English clott; akin to Middle High German klōz lump, ball — more at clout

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Verb

15th century, in the meaning defined at intransitive sense 1

Time Traveler
The first known use of clot was before the 12th century

Dictionary Entries Near clot

Cite this Entry

“Clot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/clot. Accessed 9 Feb. 2023.

Kids Definition

clot

1 of 2 noun
: a mass or lump made by a liquid (as blood) that thickens and sticks together

clot

2 of 2 verb
clotted; clotting
: to become or cause to become a clot : form clots

Medical Definition

clot

1 of 2 noun
: a coagulated mass produced by clotting of blood

clot

2 of 2 verb
clotted; clotting

intransitive verb

: to undergo a sequence of complex chemical and physical reactions that results in conversion of fluid blood into a coagulum and that involves shedding of blood, release of thromboplastin from blood platelets and injured tissues, inactivation of heparin by thromboplastin permitting calcium ions of the plasma to convert prothrombin to thrombin, interaction of thrombin with fibrinogen to form an insoluble fibrin network in which blood cells and plasma are trapped, and contraction of the network to squeeze out excess fluid : coagulate

transitive verb

: to cause to form into or as if into a clot

More from Merriam-Webster on clot

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