decussation Meaning, Definition & Usage

  1. noun an intersection or crossing of two tracts in the form of the letter X
    chiasm; chiasma.

WordNet

De`cus*sa"tion noun
Etymology
L. decussatio.
Definitions
  1. Act of crossing at an acute angle, or state of being thus crossed; an intersection in the form of an X; as, the decussation of lines, nerves, etc.

Webster 1913