[foh-tuh-foh-bee-uh] /ˌfoʊ təˈfoʊ bi ə/

noun, Pathology.
an abnormal sensitivity to or intolerance of light, as in iritis.
an abnormal fear of light.
(pathol) abnormal sensitivity of the eyes to light, esp as the result of inflammation
(psychiatry) abnormal fear of or aversion to sunlight or well-lit places

1799, from photo- + -phobia. Related: Photophobic.

photophobia pho·to·pho·bi·a (fō’tə-fō’bē-ə)


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  • Photophobic

    [foh-tuh-foh-bik] /ˌfoʊ təˈfoʊ bɪk/ adjective 1. of or relating to an organism that avoids light. photophobic pho·to·pho·bic (fō’tə-fō’bĭk) adj.

  • Photophore

    [foh-tuh-fawr, -fohr] /ˈfoʊ təˌfɔr, -ˌfoʊr/ noun, Zoology. 1. a luminous organ found in certain fishes and crustaceans. /ˈfəʊtəˌfɔː/ noun 1. (zoology) any light-producing organ in animals, esp in certain fishes

  • Photophosphorylation

    [foh-tuh-fos-fer-uh-ley-shuh n] /ˌfoʊ təˌfɒs fər əˈleɪ ʃən/ noun, Biochemistry. 1. phosphorylation that utilizes light as a source of energy, as in the formation of ATP from ADP and phosphorus during photosynthesis.

  • Photophthalmia

    photophthalmia pho·toph·thal·mi·a (fō’tŏf-thāl’mē-ə, -ŏp-) n. An inflammatory reaction of the external parts of the eye caused by intense light, as in snow blindness.

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