#canthus  either of the corners of the eye where the upper and lower eyelids meet
  supertype:  #line_corner__corner  the point where two lines meet or intersect; "the corners of a rectangle"
  part of:  #eye
  subtype:  #nasal_canthus__nasalcanthu  the inner corner of the eye
  subtype:  #temporal_canthus  the outer corner of the eye

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