bone marrow

noun

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 Those cells, from the bone marrow, produce red and white blood cells. Julie Washington, cleveland, 16 June 2021 Other signals of long-term effectiveness, such as the presence of certain types of immune cells found in the bone marrow, are promising as well. Erin Allday, San Francisco Chronicle, 31 May 2021 Important immune cells survive in the bone marrow of people who were infected with Covid-19, potentially pumping out antibodies for years, according to a new study. Eliza Mackintosh, CNN, 28 May 2021 Once the acute infection is resolved, a small number of the cells take up residence in the bone marrow, steadily pumping out modest levels of antibodies. Apoorva Mandavilli, New York Times, 26 May 2021 Platelets are tiny, golden-colored cells made in the bone marrow, which help to stop bleeding. Claire Gillespie, Health.com, 26 Apr. 2021 Zaia is leading research into a COVID-19 vaccine developed at City of Hope specifically for cancer patients, using a platform designed for bone marrow transplant patients who lose protection from all vaccines during their transplant. USA Today, 27 June 2021 Rubenstein’s claim references his specific health status, referencing a diagnosis of primary polychthemia, also called Myelofibrosis, which requires him to undergo regular bone marrow biopsies. Paul Sisson, San Diego Union-Tribune, 22 June 2021 Bone marrow aspiration is a traumatizing experience; the procedure involves inserting a needle into the hip bone to withdraw a sample of bone marrow fluid. Wunmi Bakare, Essence, 19 June 2021

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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Time Traveler for bone marrow

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The first known use of bone marrow was in 1590

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Dictionary Entries Near bone marrow

Bonellia

bone marrow

bonemeal

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Last Updated

23 Jul 2021

Cite this Entry

“Bone marrow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bone%20marrow. Accessed 28 Jul. 2021.

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More Definitions for bone marrow

bone marrow

noun

English Language Learners Definition of bone marrow

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

bone marrow

noun

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

noun

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

Britannica.com: Encyclopedia article about bone marrow

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