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bone marrow

American  

noun

  1. marrow.


bone marrow British  

noun

  1. 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  
  1. 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  
  1. See marrow.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Leukemia is a cancer of the blood that begins in the bone marrow, which varies based on the type of blood cell affected and the stage of the disease.

From Los Angeles Times Jul. 23, 2026

As the name suggests, steak is the main event, with options ranging from dry-aged ribeyes and picanha to A5 Wagyu New York strip, plus add-ons like roasted bone marrow and curry béarnaise.

From Salon Jun. 11, 2026

Caitlin was then scheduled for monthly bone marrow monitoring for three months, to check that the cancer had not returned.

From BBC Jun. 9, 2026

Research focused on using chemotherapy and radiation to wipe out diseased bone marrow, then infusing healthy donor cells to create a new immune system capable of attacking cancer and rebuilding the body’s defenses.

From The Wall Street Journal Apr. 19, 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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