bone marrow

American  

noun

1. marrow.

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bone marrow British  

noun

1. See marrow 1

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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.

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bone marrow Cultural  

1. See marrow.

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Example Sentences

Her book, “Survivor: Taking Charge of Your Fight Against Cancer,” an account of her fight against leukemia and bone marrow transplant, was published in October 1998 by Simon & Schuster.

From The Wall Street Journal • Apr. 15, 2026

Each year, more than 128,000 people in the United States receive solid organ or bone marrow transplants.

From Science Daily • Apr. 15, 2026

The researchers found no trace of the virus in samples of the man's blood, gut and bone marrow.

From Barron's • Apr. 13, 2026

The cancerous plasma cells produce large amounts of an abnormal antibody called M protein, which builds up in bone marrow and forms tumors in bones, like the one in my hip.

From Slate • Mar. 29, 2026

Once there, it can remain for decades, releasing radiation into the bones and bone marrow.

From "Meltdown" by Deirdre Langeland