chiasm definition

  • noun:
    • alternate as a type of chiasma.
    • alternate kind of chiasmus.
    • A commissure; an intersection or crossing of two tracts; specially, the optic commissure, or crucial union for the optic nerves.
    • In anatomy, a decussation or intersection; specifically, the decussation of this optic nerves which does occur in nearly all vertebrates. See second-cut under mind.
    • an intersection or crossing of two tracts by means of the page X

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