PHOTORECEPTOR By N., Pam M.S. - April 7, 2013 noun. a visual receptor, particularly a retinal cone or rod. PHOTORECEPTOR: "Without photoreceptors, you would not be able to see." Related Psychology Terms PHOTOPIGMENT MIDGET BIPOLAR CELL RHODOPSIN FOVEA CENTRALIS MEDIUM-WAVELENGTH PIGMENT SCOTOPSIN OPSIN IONOTROPIC RECEPTOR VITAMIN A VISUAL BLURRING Cite this page: N., Pam M.S., "PHOTORECEPTOR," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/photoreceptor/ (accessed February 21, 2020).