white blood cell

noun

: any of the blood cells that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils

called also leukocyte, white blood corpuscle, white cell

compare red blood cell

Examples of white blood cell in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
What multiple doctors had written off as dry skin was, in fact, cutaneous T-cell lymphoma, a rare type of non-Hodgkin lymphoma that starts in white blood cells called T cells and primarily affects the skin, according to the Cleveland Clinic. Jordan Greene, PEOPLE, 4 May 2026 Puppies with parvo may collapse, have a high heart rate, have difficulty breathing, have low white blood cell counts, be hypothermic or be hypoglycemic. Don Sweeney, Sacbee.com, 28 Apr. 2026 His older son has an immune disease called eosinophilic esophagitis, where white blood cells gather in the esophagus and cause issues with swallowing and breathing. Kerry Breen, CBS News, 25 Apr. 2026 At that time, the thymus is largely responsible for developing T cells, a critical type of white blood cell that help to fight infections. Jackie Flynn Mogensen, Scientific American, 18 Mar. 2026 See All Example Sentences for white blood cell

Word History

First Known Use

1852, in the meaning defined above

Time Traveler
The first known use of white blood cell was in 1852

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Cite this Entry

“White blood cell.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/white%20blood%20cell. Accessed 8 May. 2026.

Kids Definition

white blood cell

noun
: a colorless blood cell (as a lymphocyte) that lacks hemoglobin and contains a nucleus

called also leukocyte, white blood corpuscle, white cell, white corpuscle

Medical Definition

white blood cell

noun
: any of the blood cells of the immune system that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils along with their precursors and derivatives (as macrophages) : leukocyte
abbreviation WBC

called also white blood corpuscle, white cell, white corpuscle

compare red blood cell

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