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.
Low Blood Cell Counts Taking zinc supplements every day for several months can lower red or white blood cell counts. Lindsay Curtis, Verywell Health, 11 Feb. 2026 But those preclinical studies uncovered how T cells, specialized white blood cells that are programmed to recognize and exterminate threats like cancer, are more active in the morning. Brenda Goodman, CNN Money, 6 Feb. 2026 The condition is a cancer that forms in a type of white blood cell called a plasma cell, according to the Mayo Clinic. Colson Thayer, PEOPLE, 4 Feb. 2026 The delivery of cytokines can stimulate the white blood cell production that is damaged by exposure; treatment with potassium iodide or Prussian blue can help eliminate radioactive particles from the body; and proper washing can prevent skin burns that might take days to show up. New Atlas, 28 Jan. 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 14 Feb. 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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