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

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

The health board said the proposal was "necessary" after ongoing defects disrupted the running of the adult bone marrow transplant unit.

From BBC • Mar. 23, 2026

Slow-roasted bone marrow, branzino laced with herbs, the kind of flavors that made us lean in and feed each other.

From Los Angeles Times • Mar. 20, 2026

The treatment, known as anito-cel, is designed for patients with multiple myeloma, a blood cancer arising from plasma cells in the bone marrow.

From Barron's • Feb. 23, 2026

John’s medical hypothesis was based on the observation that phosphorus naturally concentrates in bone marrow.

From "Big Science" by Michael Hiltzik