thymus

noun
thy·​mus | \ ˈthī-məs How to pronounce thymus (audio) \
variants: or thymus gland
plural thymuses also thymi\ ˈthī-​ˌmī How to pronounce thymus (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 Easton’s other condition prevented his thymus from functioning properly. NBC News, 8 Mar. 2022 But Easton’s thymus didn’t produce the very cells that would reject a transplanted organ. NBC News, 8 Mar. 2022 These are the thymus glands or pancreas of the animal — prized by many chefs for their mildness and, yes, sweetness. Amy Drew Thompson, orlandosentinel.com, 16 Sep. 2021 Sometimes lymphomas start in the thymus gland, another part of your immune system that's located in the chest. Barbara Brody, Health.com, 13 Sep. 2021 The thymus is one place where such cleverness leaves its trace. Dhruv Khullar, The New Yorker, 11 Aug. 2021 The thymus is one place where such cleverness leaves its trace. Dhruv Khullar, The New Yorker, 11 Aug. 2021 The thymus is one place where such cleverness leaves its trace. Dhruv Khullar, The New Yorker, 11 Aug. 2021 He was intubated for 10 days and underwent a battery of tests before doctors eventually found a fist-sized tumor on his thymus gland that had triggered his immune system, according to his parents, Todd and Sue Lang. S. Wayne Carter Jr., baltimoresun.com, 25 May 2021 See More

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.

First Known Use of thymus

1578, in the meaning defined above

History and Etymology for thymus

New Latin, from Greek thymos warty excrescence, thymus

Learn More About thymus

Dictionary Entries Near thymus

thymosin

thymus

thymy

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Cite this Entry

“Thymus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thymus. Accessed 13 Aug. 2022.

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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 thymus (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

Britannica.com: Encyclopedia article about thymus

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