the physiological perception of light.

1905–10; photo- + reception

photoreceptive, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

photoreception pho·to·re·cep·tion (fō'tō-rĭ-sěp'shən)
The detection, absorption, and use of light, as for vision in animals or phototropism and photosynthesis in plants.

pho'to·re·cep'tive (-tĭv) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


any of the biological responses of organisms to stimulation by light. Most organisms, including humans, respond to visible light; some react to wavelengths of light not seen by humans; and still others can react to properties of light not detectable by humans, such as polarization (vibration of light waves in a definite pattern). This article is concerned with the sensory processes by which animals detect information carried by light.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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