[ uh-nas-tuh-moh-sis ]
/ əˌnæs təˈmoʊ sɪs /

noun, plural a·nas·to·mo·ses [uh-nas-tuh-moh-seez] /əˌnæs təˈmoʊ siz/.

Anatomy. communication between blood vessels by means of collateral channels, especially when usual routes are obstructed.
Biology, Geology. connection between parts of any branching system, as veinlets in a leaf or branches of a stream.
Surgery, Pathology. a joining of or opening between two organs or spaces that normally are not connected.

Origin of anastomosis

1605–15; < New Latin < Greek: opening. See ana-, stoma, -osis

Related forms

a·nas·to·mot·ic [uh-nas-tuh-mot-ik] /əˌnæs təˈmɒt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for anastomotic

  • While these changes are taking place the collateral arteries become enlarged, and an anastomotic circulation is established.

    Manual of Surgery|Alexis Thomson and Alexander Miles

British Dictionary definitions for anastomotic


/ (əˌnæstəˈməʊsɪs) /

noun plural -ses (-siːz)

a natural connection between two tubular structures, such as blood vessels
the surgical union of two hollow organs or parts that are normally separate
the separation and rejoining in a reticulate pattern of the veins of a leaf or of branches

Derived Forms

anastomotic (əˌnæstəˈmɒtɪk), adjective

Word Origin for anastomosis

C16: via New Latin from Greek: opening, from anastomoun to equip with a mouth, from stoma mouth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for anastomotic


[ ə-năs′tə-mōsĭs ]

n. pl. a•nas•to•mo•ses (-sēz)

The direct or indirect connection of separate parts of a branching system to form a network, especially among blood vessels.
The surgical connection of separate or severed tubular hollow organs to form a continuous channel as between two parts of the intestine.
An opening created by surgery, trauma, or disease between two or more normally separate spaces or organs.

Related forms

a•nas′to•motic (-mŏtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.