D defs.my
Entry 1 sense Webster, 1913

Hemeralopia

/hĕm′ər-ə-lō′pē-ə/ · Hem·e·ra·lo·pi·a · IPA /ˌhɛm.əɹ.əˈloʊ.pi.ə/
01 n. 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.
  1. 1.
    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.(Med.)