: an acute or chronic disease in humans and other warm-blooded animals characterized by an abnormal increase in the number of white blood cells in the tissues and often in the blood

Examples of leukemia in a Sentence

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So far, at least 17 workers have been recognized with occupational radiation illnesses (including leukemia and solid cancers), resulting in at least two deaths. Mrigakshi Dixit, Interesting Engineering, 24 Aug. 2026 The authors looked at death rates from cancers that are tied to radiation exposures, including leukemia, lymphoma, multiple myeloma, and cancers of the skin, breast, thyroid, prostate and central nervous system. ABC News, 18 Aug. 2026 Emails, texts and calls flood in from other college classmates, all rallying Papa against B-cell acute lymphoblastic leukemia and its brutal aftermath, including a months-long hospital stay that required a ventilator. Cam Inman, Mercury News, 18 Aug. 2026 Nine participants eventually developed acute myeloid leukemia (AML), but their disease did not progress in the same way. Angelica Stabile, FOXNews.com, 12 Aug. 2026 See All Example Sentences for leukemia

Word History

Etymology

New Latin

First Known Use

1850, in the meaning defined above

Time Traveler
The first known use of leukemia was in 1850

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Cite this Entry

“Leukemia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leukemia. Accessed 25 Aug. 2026.

Kids Definition

: a disease of warm-blooded animals including human beings that is a kind of cancer in which there is an abnormal increase in the number of white blood cells in the tissues and often in the blood

Medical Definition

variants also leucemia
lü-ˈkē- also lü-ˈsē-
or chiefly British leukaemia also leucaemia
: an acute or chronic disease of unknown cause in humans and other warm-blooded animals that involves the blood-forming organs, is characterized by an abnormal increase in the number of white blood cells in the tissues of the body with or without a corresponding increase of those in the circulating blood, and is classified according to the type of white blood cell most prominently involved see acute lymphoblastic leukemia, acute myelogenous leukemia, chronic lymphocytic leukemia, chronic myelogenous leukemia, feline leukemia, lymphoblastic leukemia, lymphocytic leukemia, monocytic leukemia, myelogenous leukemia, promyelocytic leukemia

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