Noun
photoreceptor (plural photoreceptors)
(biology) A specialized neuron or other structure able to detect and react to light.
At least 15 percent of human females possess a genetic mutation that gives them an extra (fourth) type of color photoreceptor - and this allows them to discriminate between colors that look identical to the majority of us with a mere three types of color photoreceptors. David Eagleman
Coleoid cephalopods (octopus, squid, cuttlefish) have a single photoreceptor type and lack the ability to determine color by comparing detected photon intensity across multiple spectral channels. Source: Internet
However, laser printing differs from analog photocopiers in that the image is produced by the direct scanning of the medium across the printer's photoreceptor. Source: Internet
In 1923, a Harvard grad student was the first to suspect there was another photoreceptor besides the rod & cones. Source: Internet
Indeed, a unique network of blood vessels is well adapted to provide the photoreceptor layer with copious quantities of blood. Source: Internet
One such suggestion is based on the argument that the mammalian photoreceptor amplification process requires vast quantities of metabolic energy, and consequently, it requires massive and homogeneous supply of blood. Source: Internet