photoreceptor

noun

pho·​to·​re·​cep·​tor ˌfō-tō-ri-ˈsep-tər How to pronounce photoreceptor (audio)
: a receptor for light stimuli

Examples of photoreceptor in a Sentence

Recent Examples on the Web
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According to certain segments of the wellness crowd, this is tantamount to taking a shvitz in Chernobyl, because the light emitted by modern devices is mostly in the blue range of the spectrum, and the photoreceptors regulating our circadian rhythms are particularly attuned to blue photons. Rowan Jacobsen, Harpers Magazine, 24 Oct. 2025 That chip replaces damaged photoreceptors. Pranjal Malewar, New Atlas, 23 Oct. 2025 The photoreceptor cells in the macula are responsible for producing sharp, detailed and colored vision. David Cox, NBC news, 20 Oct. 2025 Light reflects off surfaces, passes through the cornea and lens, and lands on the retina, where photons trigger the photoreceptors that kick off neural processing. Jonny Thomson, Big Think, 28 Aug. 2025 See All Example Sentences for photoreceptor

Word History

First Known Use

1906, in the meaning defined above

Time Traveler
The first known use of photoreceptor was in 1906

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Cite this Entry

“Photoreceptor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photoreceptor. Accessed 29 Oct. 2025.

Medical Definition

photoreceptor

noun
pho·​to·​re·​cep·​tor -ˈsep-tər How to pronounce photoreceptor (audio)
: a receptor for light stimuli

More from Merriam-Webster on photoreceptor

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