bone marrow

American

noun

marrow.

bone marrow British

noun

See marrow 1

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

bone marrow Scientific

The spongy, red tissue that fills the bone cavities of mammals. Bone marrow is the source of red blood cells, platelets, and most white blood cells.

bone marrow Cultural

See marrow.

Example Sentences

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See Examples For:

bone marrow

His patient, a young Albanian man, died after a bone marrow transplant in East London.

From Slate ● Oct. 16, 2026

Amelia is currently in remission, undergoing regular bone marrow and blood tests every three months, and has returned to school.

From BBC ● Oct. 11, 2026

The treatment also eliminated cancer from both the bone marrow and spleen.

From Science Daily ● Oct. 7, 2026

Despite a battery of tests, including a contrast CT scan and bone marrow biopsy, experts could not determine exactly what was making her critically ill.

From Los Angeles Times ● Oct. 4, 2026

It’s full of magic antiblast gas — guaranteed to save your bone marrow.

From "Drums, Girls, and Dangerous Pie" by Jordan Sonnenblick

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023