invagination

noun

in·​vag·​i·​na·​tion in-ˌva-jə-ˈnā-shən How to pronounce invagination (audio)
1
: an act or process of invaginating
specifically : the formation of a gastrula by an infolding of part of the wall of the blastula
2
: an invaginated part

Example Sentences

Recent Examples on the Web In 2010, Seely, who was a member or the Arizona State University triathlon team when she was diagnosed with Chiari II Malformation, basilar invagination, and Ehlers-Danlos Syndrome, which affect her brain, spine, and connective tissues. Madison Thacker, The Arizona Republic, 2 Oct. 2021

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

Word History

First Known Use

circa 1658, in the meaning defined at sense 1

Time Traveler
The first known use of invagination was circa 1658

Dictionary Entries Near invagination

Cite this Entry

“Invagination.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invagination. Accessed 7 Dec. 2022.

Medical Definition

invagination

noun
in·​vag·​i·​na·​tion -ˌvaj-ə-ˈnā-shən How to pronounce invagination (audio)
1
: an act or process of invaginating: as
a
: the formation of a gastrula by an infolding of part of the wall of the blastula
b
: intestinal intussusception
2
: an invaginated part
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