chiasm

Definitions of chiasm
  1. noun
    an intersection or crossing of two tracts in the form of the letter X
    synonyms: chiasma, decussation
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    types:
    chiasma opticum, optic chiasm, optic chiasma
    the crossing of the optic nerves from the two eyes at the base of the brain
    type of:
    anatomical structure, bodily structure, body structure, complex body part, structure
    a particular complex anatomical part of a living thing
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