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 The outlet reported that Gaba underwent operations, aggressive chemotherapy, radiation, and a bone marrow transplant to help treat tumors, but that this spring, the cancer spread to his lungs and brain. Rachel Desantis, PEOPLE.com, "Baltimore Ravens and Orioles Superfan Mo Gaba, 14, Dies of Cancer as Teams Pay Tribute," 29 July 2020 The smartDOT ad cites a 2015 study from the journal Stem Cell Research on effects of low-frequency electromagnetic fields on human bone marrow. Chelsey Cox, USA TODAY, "Fact check: A magnetic shield will not protect cellphone users from EMF radiation," 13 July 2020 The menu includes traditional French dishes like steak tartare, bone marrow, salad niçoise and bouillabaisse. Shaena Montanari, The Arizona Republic, "Looking for a job? This new restaurant in Scottsdale is hiring. Here's what to know," 8 July 2020 Megakaryocytes, which produce platelets that control clotting, typically exist only in the bone marrow and lungs. Author: Ariana Eunjung Cha, Anchorage Daily News, "Coronavirus autopsies: A story of 38 brains, 87 lungs and 42 hearts," 1 July 2020 Even some chemotherapy and bone marrow transplants have been postponed as physicians weigh the risk of cancer versus shattering a patient’s immune system while a contagious killer disease is still widespread. Washington Post, "Having cancer is hard. It’s more terrifying during the pandemic.," 27 June 2020 People who have had bone marrow transplants or an organ transplant or who take immune-suppressing medications are also at higher risk, the CDC said. Faith Karimi, CNN, "Millions of people may have had coronavirus in the past without knowing it, CDC says," 26 June 2020 Other developments showing promise include injections of mesenchymal stem cells, found in bone marrow and umbilical cords, that doctors are studying to battle inflammation caused by ARDS. Peter Fimrite, SFChronicle.com, "Efforts at coronavirus vaccines and treatments abound in the Bay Area," 22 June 2020 The trial is using intravenous doses of mesenchymal stem cells, which are found in bone marrow and umbilical cords, to treat people afflicted with the respiratory syndrome. J.d. Morris, SFChronicle.com, "UCSF studying stem cells as possible coronavirus treatment," 8 June 2020

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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Statistics for bone marrow

Last Updated

3 Aug 2020

Cite this Entry

“Bone marrow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bone%20marrow. Accessed 13 Aug. 2020.

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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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