adenoma

noun

ad·​e·​no·​ma ˌa-də-ˈnō-mə How to pronounce adenoma (audio)
plural adenomas also adenomata ˌa-də-ˈnō-mə-tə How to pronounce adenoma (audio)
: a benign tumor of a glandular structure or of glandular origin
adenomatous
ˌa-də-ˈnō-mə-təs How to pronounce adenoma (audio)
adjective

Examples of adenoma in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Six of the cases are meningiomas, two are gliomas, two are pituitary adenomas, and one is a schwannoma of the optic nerve. — Rick Sobey, Boston Herald, 14 June 2026 Nearly half of the runners' colons exhibited polyps (also called adenomas), which sometimes, but not always, transform into cancer. — Rachel Raposas, PEOPLE, 22 May 2026 Polyps, called adenomas, are overgrowths that sometimes turn into cancer, according to MD Anderson's website. — Catherine Dominguez, Houston Chronicle, 12 Feb. 2026 Adults with a history of precancerous colon polyps (adenomas) had gut bacteria that remained different from people who’d never had polyps, and some patterns resembled those seen in colorectal cancer. — Tom Gavin, EverydayHealth.com, 27 May 2026 See All Example Sentences for adenoma

Word History

Etymology

probably borrowed from German Adenom, Adenoma, from Greek aden-, adḗn "gland" + German -om, New Latin -oma -oma — more at adeno-

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of adenoma was in 1934

Rhymes for adenoma

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Browse Nearby Words

adenoidal
adenoma
Adenophora
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Cite this Entry

“Adenoma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/adenoma. Accessed 7 Jul. 2026.

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Medical Definition

adenoma

noun
ad·​e·​no·​ma ˌad-ᵊn-ˈō-mə How to pronounce adenoma (audio)
plural adenomas also adenomata -mət-ə How to pronounce adenoma (audio)
: a benign tumor of a glandular structure or of glandular origin
adenomatous
-mət-əs How to pronounce adenoma (audio)
adjective

More from Merriam-Webster on adenoma

Nglish: Translation of adenoma for Spanish Speakers

Britannica.com: Encyclopedia article about adenoma

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