• synonyms


[kom-uh-shoo r, -shur]
  1. a joint; seam; suture.
  2. Botany. the joint or face by which one carpel coheres with another.
  3. Anatomy, Zoology. a connecting band of nerve fiber, especially one joining the right and left sides of the brain or spinal cord.
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Origin of commissure

1375–1425; late Middle English (< Middle French) < Latin commissūra, equivalent to commiss(us) (see commissary) + -ūra -ure
Related formscom·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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for commissure

Historical Examples of commissure

  • Commissure, the line of junction of two carpels, as in the fruit of Umbellifer.

    The Elements of Botany

    Asa Gray

  • A head measured from the top of the forelock to the commissure of the lips (C).

  • Goubeaux and Barrier add: ‘Or to the commissure of the lips.’

  • This nerve is connected by a commissure with those behind, but this fact may for the moment be left out of consideration.

  • Owing to the presence of the commissure connecting the posterior roots, some part of a nerve is present in every section.

British Dictionary definitions for commissure


  1. 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
  2. any of various joints between parts, as between the carpels, leaf lobes, etc, of a plant
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Derived Formscommissural (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

commissure in Medicine


  1. A line or place at which two things are joined.
  2. A tract of nerve fibers passing from one side to the other of the spinal cord or brain.
  3. The point, angle, or surface where two parts, such as the eyelids, lips, or cardiac valves, join or connect.
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Related formscom′mis•sural adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.