Etymology
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photophobia (n.)

"intolerance or dread of light," 1799, from photo- "light" + -phobia. Related: Photophobic; photophobe.

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Definitions of photophobia

photophobia (n.)
a morbid fear of light;
photophobia (n.)
pain in the eye resulting from exposure to bright light (often associated with albinism);
Synonyms: photalgia
From wordnet.princeton.edu