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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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bone marrow

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

Multiple myeloma is a cancer of a type of white blood cells called plasma cells in the bone marrow.

From Los Angeles Times ● Sep. 30, 2026

Finding comparable structures in healthy bone marrow was unexpected.

From Science Daily ● Sep. 17, 2026

Certain chemicals, again reminding us of radiation products like Strontium 90, have a peculiar affinity for the bone marrow.

From "Silent Spring" by Rachel Carson

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