decussation

/ˌdɛkəˈseɪʃən/
noun
  1. The act or result of crossing or intersecting, especially in the form of an X; a crossing point.
    • The decussation of the fibers in the spinal cord allows the left side of the brain to control the right side of the body.
    • The decussation of the two roads made the intersection confusing for drivers.
    • In anatomy, the optic chiasm is a famous decussation where some nerve fibers cross.
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