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 cellExamples of red blood cell in a Sentence
Recent Examples on the Web
But with toxic levels of cobalt, the transcription factor is active without low oxygen levels, leading to abnormally high amounts of hemoglobin-carrying red blood cells—explaining the woman’s high hemoglobin levels.
—
Beth Mole,
ArsTechnica,
2 July 2026
Donors who pass a medical exam can be paid; first-time donors can earn up to $750 within 35 days, with amounts varying by donation volume, red blood cell levels and promotional offers.
—
John Marks,
Charlotte Observer,
2 July 2026
Among these is folate, which plays an important role in red blood cell production.
—
Sarah Bence,
Verywell Health,
30 June 2026
Jaundice is caused by a buildup of bilirubin, a substance the body makes when red blood cells break down.
—
Jen Christensen,
CNN Money,
24 June 2026
See All Example Sentences for red blood cell
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Beth Mole,
ArsTechnica,
2 July 2026
Donors who pass a medical exam can be paid; first-time donors can earn up to $750 within 35 days, with amounts varying by donation volume, red blood cell levels and promotional offers.
—
John Marks,
Charlotte Observer,
2 July 2026
Among these is folate, which plays an important role in red blood cell production.
—
Sarah Bence,
Verywell Health,
30 June 2026
Jaundice is caused by a buildup of bilirubin, a substance the body makes when red blood cells break down.
—
Jen Christensen,
CNN Money,
24 June 2026
See All Example Sentences for red blood cell
Cite this Entry
“Red blood cell.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20blood%20cell. Accessed 5 Jul. 2026.
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