tubercle

noun
tu·​ber·​cle | \ ˈtü-bər-kəl How to pronounce tubercle (audio) , ˈtyü- \

Definition of tubercle

1 : a small knobby prominence or excrescence especially on a plant or animal : nodule: such as
a : a protuberance near the head of a rib that articulates with the transverse process of a vertebra
b : any of several prominences in the central nervous system
2 : a small abnormal discrete lump in the substance of an organ or in the skin especially : the specific lesion of tuberculosis

Examples of tubercle in a Sentence

Recent Examples on the Web Voight and colleagues then studied the animals' physical structures, including their arm suckers, warts, and tubercles, or little bumps inside the warts that give them texture. Liz Langley, National Geographic, "The deeper this purple octopus lives, the bumpier its skin," 8 Oct. 2019 In turn, the ruptured tubercles attract dissolved copper, spurring a chemical reaction that can pit and weaken the surrounding steel. Peter Passi / Forum News Service, Twin Cities, "Popular Duluth museum ship’s corrosion extends to its rivets," 5 Sep. 2019 Those tubercles can be opened by the scouring power of winter ice. Peter Passi / Forum News Service, Twin Cities, "Popular Duluth museum ship’s corrosion extends to its rivets," 5 Sep. 2019 Allison and his colleagues also found lesions (called tubercles) and Mycobacterium tuberculosis bacteria in the boy’s lungs, heart, liver, and right kidney. Kiona N. Smith, Ars Technica, "Mummy of paraplegic child shows how Peru’s Nasca culture treated disability," 25 Sep. 2018 According to Carly Cassella of Science Alert, the critter boasts a number of features that are not seen in any other modern turtle, like the two rows of tubercles that act like feelers. Brigit Katz, Smithsonian, "Turtle That Breathes Through Its Genitals Lands on Endangered Reptiles List," 13 Apr. 2018

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

1556, in the meaning defined at sense 1

History and Etymology for tubercle

Latin tuberculum, diminutive of tuber

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Time Traveler for tubercle

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The first known use of tubercle was in 1556

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Cite this Entry

“Tubercle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tubercle. Accessed 26 Feb. 2020.

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More Definitions for tubercle

tubercle

noun
tu·​ber·​cle | \ ˈt(y)ü-bər-kəl How to pronounce tubercle (audio) \

Medical Definition of tubercle

1 : a small knobby prominence or excrescence: as
a : a prominence on the crown of a molar tooth
b : a small rough prominence (as the greater tubercle or adductor tubercle) on a bone usually being smaller than a tuberosity and serving for the attachment of one or more muscles or ligaments
c : an eminence near the head of a rib that articulates with the transverse process of a vertebra
d : any of several prominences (as the acoustic tubercle) in the central nervous system that mark the nuclei of various nerves
2 : a small discrete lump in the substance of an organ or in the skin especially : the specific lesion of tuberculosis consisting of a packed mass of epithelioid cells, giant cells, disintegration products of white blood cells and bacilli, and usually a necrotic center

More from Merriam-Webster on tubercle

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Britannica English: Translation of tubercle for Arabic Speakers

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