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xeroderma pigmentosum
(redirected from Allergic to light)

   Also found in: Wikipedia 0.09 sec.
xeroderma pig·men·to·sum (pgmn-tsm, -mn-)
n.
A rare hereditary skin disorder caused by a defect in the enzymes that repair DNA damaged by ultraviolet light and resulting in hypersensitivity to the carcinogenic effect of ultraviolet light.


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But the creatures aren't too urgent a threat, since they're allergic to light - and the planet fortunately revolves around three suns (an astronomical phenomenon that's never explained).
 
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