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

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 The company uses human stem cells to create bone marrow cells, which would then be put in a bioreactor. Jonathan Saltzman,, "Department of Defense gives $3.5m to biotech making blood platelets from stem cells," 27 June 2018 But there is also evidence that bone marrow stem cells or abdominal cells can transform into endometrial tissue. Marie Mccullough,, "Frustrated endometriosis patients fuel surge in activism while seeking answers," 12 Apr. 2018 At 2,000 RPMs, my blood, fat and bone marrow were placed in a centrifuge for 13 minutes. Scott Tinley,, "A firsthand experience with stem cell treatment in pitching arm," 3 Aug. 2011 Appointments with Native-American potion makers, a Buddhist monk meditation teacher, platelet specialists from Kiev, pain management doctors from New York, bone marrow scientists from Buenos Aires. Jason Sheeler, Vogue, "How George Michael, A Buddhist Monk, and A Stripper Saved My Life," 14 Feb. 2019 Your treatment plan may involve chemotherapy, radiation therapy, surgery, and a bone marrow transplant, the Mayo Clinic explains. Sarah Jacoby, SELF, "WWE Star Roman Reigns Reveals Leukemia Diagnosis: 'I Will Beat This and I Will Be Back'," 23 Oct. 2018 Giavanna Danninger, 5, was diagnosed with aplastic anemia that led to a bone marrow transplant last fall. Evan Frank, Milwaukee Journal Sentinel, "Oconomowoc and Hartland families will participate in the 36-hour WKLH Miracle Marathon for Children's Hospital," 16 May 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

1850, in the meaning defined above

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Statistics for bone marrow

Last Updated

17 Mar 2019

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Time Traveler for bone marrow

The first known use of bone marrow was in 1850

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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

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of or relating to a parable or parabola

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