: 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

Recent Examples on the Web
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But Macdonald also spent the last nine years of his life battling leukemia while keeping it secret not just from his audience but his friends. — Stuart Miller, Los Angeles Times, 20 Oct. 2026 In 2023, Kyedae was diagnosed with acute myeloid leukemia, a blood and bone marrow cancer. — Ct Jones, Rolling Stone, 20 Oct. 2026 As Rose begins his fight against leukemia, his family is facing the emotional and financial challenges of medical treatments and ongoing healthcare expenses. — Charles Baggarly, Fort Worth Star-Telegram, 19 Oct. 2026 After more than two years of treatment for leukemia, their little girl had reached the finish line. — Kaley Fedko, CBS News, 19 Oct. 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

Browse Nearby Words

Cite this Entry

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