red blood cell

noun

variants or less commonly red blood corpuscle or red cell or red corpuscle
: any of the hemoglobin-containing cells that carry oxygen to the tissues and in mammals are typically biconcave disks which lack a nucleus and cellular organelles and are formed from nucleated cells of the red bone marrow

Note: The number of red blood cells ranges from four to six million in each cubic millimeter of normal human blood. The red color of blood is due to the presence of hemoglobin within the red blood cells.

called also erythrocyte

compare white blood cell

Examples of red 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 disease changes the shape of red blood cells in a way that can block blood flow to the rest of the body. Maya Goldman, Axios, 26 Feb. 2025 Your red blood cells deliver oxygen throughout the body, and a lack of red blood cells may cause fatigue, dizziness, and shortness of breath. Carrie Madormo, Rn, Health, 21 Feb. 2025 Sickle cell is a blood disorder in which a person’s red blood cells become misshapen into crescent moons. Bertha Coombs, CNBC, 18 Feb. 2025 This conversion then causes red blood cells to become more alkaline, Takahashi said. Sandee Lamotte, CNN, 21 Jan. 2025 See All Example Sentences for red blood cell

Word History

First Known Use

1850, in the meaning defined above

Time Traveler
The first known use of red blood cell was in 1850

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Cite this Entry

“Red blood cell.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20blood%20cell. Accessed 3 Mar. 2025.

Kids Definition

red blood cell

noun
: a reddish cell of the blood that contains hemoglobin and carries oxygen from the lungs to the tissues

called also erythrocyte, red blood corpuscle, red cell, red corpuscle

Medical Definition

red blood cell

noun
: any of the hemoglobin-containing cells that carry oxygen to the tissues and are responsible for the red color of vertebrate blood

called also erythrocyte, red blood corpuscle, red cell, red corpuscle

compare white blood cell

More from Merriam-Webster on red blood cell

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