bone marrow


Definition of bone marrow

: a soft highly vascular modified connective tissue that occupies the cavities of most bones and occurs in two forms:
a : one that is yellowish, consists chiefly of fat cells, and is found especially in the cavities of long bones
b : one that is reddish, is the chief site of blood cell formation, and occurs in the normal adult in cancellous tissue especially of certain flat bones

called also red marrow

Examples of bone marrow in a Sentence

Recent Examples on the Web

So on July 28, 2016, doctors in Alabama extracted some of Ryals’s bone marrow and, the next day, doctors in California transplanted it into Skye’s bloodstream. Lindsey Bever, Washington Post, "A bride gave bone marrow to save a stranger’s baby. The child lived — and was her flower girl.," 3 July 2018 Data reviewed by The Wall Street Journal, show that 39 out of 57 multiple myeloma patients treated through September had no detectable trace of cancer in their bone marrow a median 7.6 months after receiving the therapy. Preetika Rana, WSJ, "How China Is Evolving From a Maker of Copycat Medicines Into a Producer of Complex Drugs," 5 Aug. 2018 She had been diagnosed with myelodysplastic syndrome, a rare and exotic form of cancer that inhibits the bone marrow from producing healthy blood cells. Charles P. Pierce,, "Marcus Smart Continues to Give the Celtics Exactly What They Need," 14 May 2018 The several large plates, sized for two diners, include kimchi paella ($20) and beef short ribs with bone marrow and sweet potato puree ($35). Carol Deptolla, Milwaukee Journal Sentinel, "Char'd, with a modern Korean menu, plans to open Thursday in the Third Ward," 16 May 2018 This new half-a-million cell dataset is magnitudes larger and will soon be eclipsed by another dataset of 1.08 million cord blood, bone marrow and white blood cells that the Broad Institute will soon release. Jason Daley, Smithsonian, "Human Cell Atlas Releases First Major Data Set," 20 Apr. 2018 The team took samples from Ata’s bone marrow and sequenced the DNA, mapping it against a human reference genome. Matt Warren, Science | AAAS, "This strange ‘alien’ skeleton is actually a human fetus with genetic bone defects," 22 Mar. 2018 The new patient, described in a Nature article published Tuesday, received a bone marrow transplant in 2016 as a treatment for Hodgkin’s lymphoma, a cancer of the lymphatic system. Jill Kiedaisch, Popular Mechanics, "A Patient with HIV Has Gone Into Remission—Only the Second Case in Recorded Medical History," 6 Mar. 2019 Using lab tools to activate that reward circuit in mice, scientists discovered that its chemical signals reach the immune system, empowering a subset of bone marrow cells to slow the growth of tumors. Esther Landhuis, Scientific American, "Could Brain Stimulation Slow Cancer?," 13 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bone marrow.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of bone marrow

1590, in the meaning defined above

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Dictionary Entries near bone marrow


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bone marrow


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bone phosphate

Statistics for bone marrow

Last Updated

12 May 2019

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Time Traveler for bone marrow

The first known use of bone marrow was in 1590

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More Definitions for bone marrow

bone marrow


English Language Learners Definition of bone marrow

: a soft substance that fills the bones of people and animals

bone marrow


Kids Definition of bone marrow

: a soft tissue rich in blood vessels that fills the spaces of most bones and includes one type that is red and produces red blood cells and white blood cells and another type that is yellow and contains fat

bone marrow


Medical Definition of bone marrow

: a soft highly vascular modified connective tissue that occupies the cavities and cancellous part of most bones and occurs in two forms:
a : a whitish or yellowish bone marrow that consists chiefly of fat cells and is found especially in the cavities of the long bones

called also yellow marrow

b : a reddish bone marrow that contains little fat, is the chief site of red blood cell and blood granulocyte formation, and occurs in the normal adult in cancellous tissue especially of certain flat bones

called also red marrow

More from Merriam-Webster on bone marrow

Rhyming Dictionary: Words that rhyme with bone marrow Encyclopedia article about bone marrow

Comments on bone marrow

What made you want to look up bone marrow? Please tell us where you read or heard it (including the quote, if possible).


one that collects or salvages junk

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