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Webster 1913 Edition

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Noun.

[NL., fr. Gr. [GREEK], the opposite of [GREEK]; [GREEK] day + [GREEK] of [GREEK]. See

(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.

☞ Some writers (as Quain) use the word in the opposite sense, i. e., day blindness. See

See also: hemeralopía

hemeralopia ‎(plural hemeralopias)