pho·​to·​sen·​si·​tive | \ˌfō-tō-ˈsen(t)-s(ə-)tiv \

Definition of photosensitive 

1 : sensitive to the action of radiant energy photosensitive paper

2 : being or caused by an abnormal reaction to sunlight photosensitive rashes

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Other Words from photosensitive

photosensitivity \ ˌfō-​tō-​ˌsen(t)-​sə-​ˈti-​və-​tē \ noun

Examples of photosensitive in a Sentence

paper with a photosensitive coating

Recent Examples on the Web

These pictures produced with photosensitive materials, but without a camera, expanded the Bauhaus’s vision of photography as a way of imagining new worlds. Tobias Grey, WSJ, "Two by Two," 14 Sep. 2018 Early film used photosensitive chemicals placed on a nitrate base, which made the film extremely flammable. Joe Pappalardo, Popular Mechanics, "There Are Secrets in the Texas Theatre," 25 May 2018 Certain frequencies of light can trigger seizures for photosensitive epileptics, about 3 percent of those with epilepsy. Amanda Svachula, New York Times, "‘Incredibles 2’ Moviegoers Warned About Possible Seizures," 18 June 2018 As the disease advanced, people displayed a symmetrical photosensitive rash across their limbs, neck and face. Kristin Baird Rattini, Discover Magazine, "The American South's Deadly Diet," 13 Feb. 2018 In a regular camera there is a lens that focuses light on a photosensitive medium like film. Jennifer Nalewicki, Smithsonian, "Explore the Subterranean Chambers of the World’s Longest-Operating Hologram Gallery," 9 Feb. 2018 This includes ipRGCs, or intrinsically photosensitive retinal ganglion cells. Brittany Nader,, "University of Akron biology professor, team of scientists make breakthrough discovery on vision," 17 Jan. 2018 Light falls onto an array of photosensitive silicon nanowires that function as photoreceptor cells. Bradley J. Fikes,, "Retinal prosthesis could enable blind to see shapes, even text," 5 Sep. 2017 Instead, the information is being stored on a new medium called Piql, which, according to a press release, uses high-resolution photosensitive film to store data. Jason Daley, Smithsonian, "A Second Doomsday Vault—This One to to Preserve Data—Is Opening in Svalbard," 5 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photosensitive.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of photosensitive

1886, in the meaning defined at sense 1

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Last Updated

14 Nov 2018

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The first known use of photosensitive was in 1886

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English Language Learners Definition of photosensitive

: reacting to light by changing color, creating electricity, etc.


pho·​to·​sen·​si·​tive | \ˌfōt-ō-ˈsen(t)-sət-iv, -ˈsen(t)-stiv \

Medical Definition of photosensitive 

1 : sensitive or sensitized to the action of radiant energy photosensitive paper

2 : being or caused by an abnormal reaction to sunlight photosensitive rashes

Other Words from photosensitive

photosensitivity \ -​ˌsen(t)-​sə-​ˈtiv-​ət-​ē \ noun plural photosensitivities

More from Merriam-Webster on photosensitive

Nglish: Translation of photosensitive for Spanish Speakers

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