[ kom-uh-shoo r, -shur ]
/ ˈkɒm əˌʃʊər, -ˌʃɜr /


a joint; seam; suture.
Botany. the joint or face by which one carpel coheres with another.
Anatomy, Zoology. a connecting band of nerve fiber, especially one joining the right and left sides of the brain or spinal cord.

Origin of commissure

1375–1425; late Middle English (< Middle French) < Latin commissūra, equivalent to commiss(us) (see commissary) + -ūra -ure

Related forms

com·mis·su·ral [kuh-mish-er-uh l, kom-uh-shoo r-uh l, -shur-] /kəˈmɪʃ ər əl, ˌkɒm əˈʃʊər əl, -ˈʃɜr-/, adjectivein·ter·com·mis·sur·al, adjectivepseu·do·com·mis·su·ral, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for commissure

British Dictionary definitions for commissure


/ (ˈkɒmɪˌsjʊə) /


a band of tissue linking two parts or organs, such as the nervous tissue connecting the right and left sides of the brain in vertebrates
any of various joints between parts, as between the carpels, leaf lobes, etc, of a plant

Derived Forms

commissural (kəˈmɪsjʊrəl, ˌkɒmɪˈsjʊərəl), adjective

Word Origin for commissure

C15: from Latin commissūra a joining together, from committere commit
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 commissure


[ kŏmə-shur′ ]


A line or place at which two things are joined.
A tract of nerve fibers passing from one side to the other of the spinal cord or brain.
The point, angle, or surface where two parts, such as the eyelids, lips, or cardiac valves, join or connect.

Related forms

com′mis•sural adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.