decussation

noun
de·​cus·​sa·​tion | \ ˌde-kə-ˈsā-shən How to pronounce decussation (audio) , ˌdē-ˌkə- How to pronounce decussation (audio) \

Definition of decussation

1 : the action of crossing (as of nerve fibers) especially in the form of an X
2 : a crossed tract of nerve fibers passing between centers on opposite sides of the nervous system

First Known Use of decussation

circa 1656, in the meaning defined at sense 1

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The first known use of decussation was circa 1656

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Cite this Entry

“Decussation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decussation. Accessed 28 Nov. 2020.

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More Definitions for decussation

decussation

noun
de·​cus·​sa·​tion | \ ˌdē-(ˌ)kə-ˈsā-shən How to pronounce decussation (audio) \

Medical Definition of decussation

1 : the action of intersecting or crossing (as of nerve fibers) especially in the form of an X — see pyramidal decussation
2a : a band of nerve fibers that connects unlike centers on opposite sides of the nervous system
b : a crossed tract of nerve fibers passing between centers on opposite sides of the central nervous system : commissure

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