thymus

noun
thy·​mus | \ ˈthī-məs How to pronounce thymus (audio) \
variants: or thymus gland
plural thymuses also thymi\ ˈthī-​ˌmī How to pronounce thymi (audio) \

Definition of thymus

: a glandular structure of largely lymphoid tissue that functions especially in cell-mediated immunity by being the site where T cells develop, is present in the young of most vertebrates typically in the upper anterior chest or at the base of the neck, and gradually decreases in size and activity after puberty

Examples of thymus in a Sentence

Recent Examples on the Web

Opponents, however, say that newer methods, including the use of thymus tissue from newborn infants who undergo heart surgeries, appear promising. oregonlive.com, "Donald Trump ends federal funding of research using fetal tissue," 6 June 2019 Opponents, however, say that newer methods, including the use of thymus tissue from newborn infants who undergo heart surgeries, appear promising. oregonlive.com, "Donald Trump ends federal funding of research using fetal tissue," 6 June 2019 Opponents, however, say that newer methods, including the use of thymus tissue from newborn infants who undergo heart surgeries, appear promising. oregonlive.com, "Donald Trump ends federal funding of research using fetal tissue," 6 June 2019 Opponents, however, say that newer methods, including the use of thymus tissue from newborn infants who undergo heart surgeries, appear promising. Amy Goldstein, Anchorage Daily News, "Trump administration imposes new restrictions on fetal tissue research," 5 June 2019 Opponents, however, say that newer methods, including the use of thymus tissue from newborn infants who undergo heart surgeries, appear promising. The Washington Post, The Mercury News, "New Trump administration rules sink UCSF research contract," 5 June 2019 Dria has been waiting over a year for a thymus transplant to regenerate her immune cells. Julie Gallant, Ramona Sentinel, "Family stays by side of 4-year-old awaiting transplants," 12 June 2018 Even more critical is his need for a thymus transplant. Peter Rowe, sandiegouniontribune.com, "A Mother's Day gift for a struggling baby: loving attention," 13 May 2018 In the older sedentary people, the output of new T cells from the thymus glands was low. Gretchen Reynolds, New York Times, "How Exercise Can Keep Aging Muscles and Immune Systems ‘Young’," 14 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thymus.' 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 thymus

1578, in the meaning defined above

History and Etymology for thymus

New Latin, from Greek thymos warty excrescence, thymus

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Dictionary Entries near thymus

thymocyte

thymol

thymosin

thymus

thymy

thymyl

thynnid

Statistics for thymus

Last Updated

19 Jul 2019

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Time Traveler for thymus

The first known use of thymus was in 1578

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More Definitions for thymus

thymus

noun
thy·​mus | \ ˈthī-məs How to pronounce thymus (audio) \
variants: or thymus gland
plural thymuses also thymi\ -​ˌmī How to pronounce thymi (audio) \

Medical Definition of thymus

: a glandular structure of largely lymphoid tissue that functions in cell-mediated immunity by being the site where T cells develop, that is present in the young of most vertebrates typically in the upper anterior chest or at the base of the neck, that arises from the epithelium of one or more embryonic branchial clefts, and that gradually decreases in size and activity after puberty

More from Merriam-Webster on thymus

Rhyming Dictionary: Words that rhyme with thymus

Britannica.com: Encyclopedia article about thymus

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