lesion

noun
le·sion | \ˈlē-zhən \

Definition of lesion 

1 : injury, harm

2 : an abnormal change in structure of an organ or part due to injury or disease especially : one that is circumscribed (see circumscribe sense 1) and well defined

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Other Words from lesion

lesioned \ˈlē-zhənd \ adjective

Examples of lesion in a Sentence

Recent Examples on the Web

Some past fish kills have been epic in proportions: In 1997, an outbreak of Pfisteria caused lesions in fish as well as health problems in watermen. Christina Tkacik, Washington Post, "Maryland officials investigate fish kill in Baltimore Harbor," 1 May 2018 All of the leaves above the lesions soon wilt and turn brown. Neil Sperry, San Antonio Express-News, "Once vincas succumb to fungus, that bed is dead to them," 22 June 2018 Former University of Kansas point guard Devonté Graham has suffered a condylar lesion in his right knee and will miss the rest of the Las Vegas NBA Summer League, the Charlotte Hornets announced on Wednesday on the team’s official website. Gary Bedore, kansascity, "Devonté Graham suffers injury to right knee, according to report from NBA’s Hornets," 11 July 2018 With sufficient moisture, the spores germinate, penetrate the leaf surface and cause lesions. Tim Johnson, chicagotribune.com, "Fungal diseases may be cause of brown spots on tree leaves," 26 June 2018 Doctors used radiation treatments to shrink the patient’s spleen and skin lesions. Denise Grady, New York Times, "A Promising Cancer Treatment Made Patients Worse, Not Better," 5 June 2018 If this hasn’t been done, the circular lesions may not be ringworm-related. Dr. Patty Khuly, miamiherald, "Ringworm not really a worm but a fungus contagious to pets and humans | Miami Herald," 18 May 2018 Border: Melanoma lesions usually have irregular borders that are hard to define. Jeffrey Farma, Philly.com, "Q&A: What steps can I take to avoid skin cancer?," 8 May 2018 The lesion is cut out and microscopically examined to detect the stage of melanoma. Bradley J. Fikes, sandiegouniontribune.com, "Battling skin cancer with a piece of tape instead of a scapel," 14 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lesion.' 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 lesion

15th century, in the meaning defined at sense 1

History and Etymology for lesion

Middle English, from Anglo-French, from Latin laesion-, laesio, from laedere to injure

Anglo-French, damage, injury, from Latin laesio, from laedere to injure

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Statistics for lesion

Last Updated

20 Oct 2018

Look-up Popularity

Time Traveler for lesion

The first known use of lesion was in the 15th century

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More Definitions for lesion

lesion

noun

English Language Learners Definition of lesion

medical : an injured or diseased spot or area on or in the body

lesion

noun
le·sion | \ˈlē-zhən \

Kids Definition of lesion

: an abnormal spot or area of the body caused by sickness or injury

lesion

noun
le·sion | \ˈlē-zhən \

Medical Definition of lesion 

(Entry 1 of 2)

: an abnormal change in structure of an organ or part due to injury or disease especially : one that is circumscribed and well defined

Other Words from lesion

lesioned \-zhənd \ adjective

Medical Definition of lesion (Entry 2 of 2)

: to produce lesions in (as an animal's brain)

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lesion

noun
le·sion | \ˈlē-zhən \

Legal Definition of lesion 

in the civil law of Louisiana : loss from failure to receive a threshold amount or value (as one-half market value) for immovable property conveyed or transferred by a commutative contract (as a sale or exchange)

called also lesion beyond moiety

— compare unjust enrichment

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