#visual_cell  one of the cells of the retina that is sensitive to light
  supertype:  #somatic_cell__somaticcell  any of the cells of a plant or animal except the reproductive cells
  part of:  #retina
  subtype:  #retinal_cone__retinalcone__cone__cone_cell  visual receptor cell sensitive to color
  subtype:  #retinal_rod__retinalrod__rod__rodcell  visual receptor cell sensitive to dim light

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