cone cell

n.
  1. One of the photoreceptors in the retina of the eye that is responsible for daylight and color vision; they are densely concentrated in the fovea centralis, creating the area of greatest visual acuity.cone retinal cone
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.