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.
The news came after her doctor noticed an imbalance in her white blood cell count. Nicole Fallert, USA Today, 30 Dec. 2025 While in the hospital for the birth of her second child, her doctor noticed her white blood cell count was high. Marc Levy, Fortune, 30 Dec. 2025 Just hours after giving birth, Schlossberg said doctors noticed issues with her abnormally high white blood cell count. Emma Banks, InStyle, 30 Dec. 2025 Asymptomatic bacteriuria represents the growth of bacteria in a culture with or without white blood cells in the urine of a person who lacks symptoms of a UTI such as burning upon urination. Neil Gaffin, STAT, 29 Dec. 2025 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 2 Jan. 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

More from Merriam-Webster on white blood cell

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