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photon
photonegative
photonics
photonuclear
photoperiod
photoperiodism
photopheresis
photophilic
photophobia
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photophore
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photophobia
pho·to·pho·bi·a [ ftə fṓbee ə ]


noun 
Definition:
 
1. sensitivity to light: very low tolerance of the eye for light, sometimes a symptom of disease or migraine
2. fear of light: an irrational fear and avoidance of light or lighted spaces
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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