opsin

n. the protein component of visual photopigments. There is one opsin for all rods (rod opsin, or scotopsin), which together with retinal forms the rod photopigment rhodopsin. There are three different cone opsins (photopsins), which convey different peak wavelength sensitivities to each of the three different cone photopigments (see iodopsin).

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Psychology term of the day

December 18th 2024

oneiromancy

n. the art or practice of divining the future from dreams. See divination. See also clairvoyant dream; premonitory dream.