[dee-kuh-sey-shuh n, dek-uh-]


a process of becoming or condition of being crossed in the form of an X.
Anatomy. a nerve or tract of nerve fibers that crosses from one side of the central nervous system to the other.

Origin of decussation

First recorded in 1650–60; decussate + -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for decussation

Historical Examples of decussation

Medicine definitions for decussation


[dĕk′ə-sāshən, dē′kə-]


A crossing in the shape of an X.
An X-shaped crossing, especially of homonymous nerves or bands of nerve fibers, connecting corresponding parts on opposite sides of the brain or spinal cord.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.