Lesion meaning

lē'zhən
The definition of a lesion is a wound or an area of the body that has been damaged through injury or disease.

An open wound is an example of a lesion.

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Any of various pathological or traumatic changes in a bodily organ or tissue, including tumors, ulcers, sores, and wounds.
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To cause a lesion to form on or in.
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An injury; hurt; damage.
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An injury or other change in an organ or tissue of the body tending to result in impairment or loss of function.
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Any of various pathological or traumatic changes in a bodily organ or tissue, including tumors, ulcers, sores, and wounds.
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To cause a lesion to form on or in.
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(medicine) An infected or otherwise injured or diseased organ or part, especially such patch of skin.
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To wound or injure, especially in an experiment or other controlled procedure.
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Origin of lesion

  • Middle English lesioun from Old French lesion from Latin laesiō laesiōn- from laesus past participle of laedere to injure
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Middle English, from Middle French, from Latin laesiō (“injury"), itself from laesus, perfect passive participle of laedō (“I injure, hurt").
    From Wiktionary