agen·​e·​sis | \ (ˌ)ā-ˈje-nə-səs How to pronounce agenesis (audio) \

Definition of agenesis

: lack or failure of development (as of a body part)

Examples of agenesis in a Sentence

Recent Examples on the Web Domenech’s brother Colin, who turns 28 on April 30, was born without the band of white matter that connects the two hemispheres in the brain, a condition called agenesis of the corpus callosum. Edward Lee, Baltimore Sun, 16 Apr. 2022 The men had been sharing their own struggles with depression and Cooper Jones, who was born with a rare congenital condition called sacral agenesis, began to feel a moment of connection. Sam Gillette,, 6 Apr. 2022 When Blake was 4, she was diagnosed with sacral agenesis, a form of spina bifida. Mckenna Oxenden, Baltimore Sun, 31 Mar. 2022 The medical name for my disability is sacral agenesis. New York Times, 29 Mar. 2022 Sometimes embryonic kidney cells fail to develop, a condition called renal agenesis. Crocker Stephenson, Milwaukee Journal Sentinel, 24 Aug. 2021 Dave was born with sacral agenesis, a congenital condition in which the lowest portion of the spine that forms the joint with the hips fails to develop. Richard Sandomir, New York Times, 10 Nov. 2020 The 16-year-old, who was born with a rare congenital disorder known as agenesis of the corpus callosum, made a big basket in the game that Legend won 46-32. Joe Rubino, The Denver Post, 21 Feb. 2017 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'agenesis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of agenesis

circa 1879, in the meaning defined above

History and Etymology for agenesis

a- entry 2 + genesis, on the model of French agénésie

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Time Traveler for agenesis

Time Traveler

The first known use of agenesis was circa 1879

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Last Updated

27 Apr 2022

Cite this Entry

“Agenesis.” Dictionary, Merriam-Webster, Accessed 19 May. 2022.

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More Definitions for agenesis


agen·​e·​sis | \ (ˈ)ā-ˈjen-ə-səs How to pronounce agenesis (audio) \
plural ageneses\ -​ˌsēz How to pronounce agenesis (audio) \

Medical Definition of agenesis

: lack or failure of development (as of a body part)

More from Merriam-Webster on agenesis Encyclopedia article about agenesis


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