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2 definitions found
 for Hemeralopia
From The Collaborative International Dictionary of English v.0.48 :

  Hemeralopia \Hem`e*ra*lo"pi*a\, n. [NL., fr. Gr. ?, the opposite
     of ?; ? day + ? of ?. See Nyctalopia.] (Med.)
     A disease of the eyes, in consequence of which a person can
     see clearly or without pain only by daylight or a strong
     artificial light; day sight.
     [1913 Webster]
     Note: Some writers (as Quain) use the word in the opposite
           sense, i. e., day blindness. See Nyctalopia.
           [1913 Webster]

From WordNet (r) 3.0 (2006) :

      n 1: inability to see clearly in bright light [syn:
           hemeralopia, day blindness]

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