decussation
de·cus·sa·tion
noun \ˌde-kə-ˈsā-shən, ˌdē-ˌkə-\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
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