anas·​to·​mo·​sis ə-ˌna-stə-ˈmō-səs How to pronounce anastomosis (audio)
plural anastomoses ə-ˌna-stə-ˈmō-ˌsēz How to pronounce anastomosis (audio)
: the union of parts or branches (as of streams, blood vessels, or leaf veins) so as to intercommunicate or interconnect
: a product of anastomosis : network
anastomotic adjective

Examples of anastomosis in a Sentence

Recent Examples on the Web The diameters of the jejunum and ileum remained stable, maintaining a favorable jejunum-to-ileum ratio, and the strength of the anastomosis improved. The Salt Lake Tribune, 16 Aug. 2023 For their study, researchers from the same universities that developed the device enlisted 20 women to undergo lymphatico-venous anastomosis — a surgical procedure used to treat a common breast cancer surgery complication. Mclean Bennett, Discover Magazine, 11 Feb. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'anastomosis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Late Latin, from Greek anastomōsis, from anastomoun to provide with an outlet, from ana- + stoma mouth, opening — more at stomach entry 1

First Known Use

1541, in the meaning defined at sense 1

Time Traveler
The first known use of anastomosis was in 1541

Dictionary Entries Near anastomosis

Cite this Entry

“Anastomosis.” Dictionary, Merriam-Webster, Accessed 16 Jul. 2024.

Medical Definition


anas·​to·​mo·​sis ə-ˌnas-tə-ˈmō-səs How to pronounce anastomosis (audio) ˌan-əs- How to pronounce anastomosis (audio)
plural anastomoses -ˌsēz How to pronounce anastomosis (audio)
: a communication between or coalescence of blood vessels
: the surgical union of parts and especially hollow tubular parts
anastomosis of the ureter and colon is surgically practicable
: a product of anastomosis
especially : a network (as of channels or branches) produced by anastomosis
anastomotic adjective
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