mydriasis

Noun

WordNet 3.0

Noun (1)

  1. reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs
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Webster's Dictionary (GCIDE)

Mydriasis \My*dri"a*sis\, n. [L., fr. Gr. ?.] (Physiol. & Med.) A long-continued or excessive dilatation of the pupil of the eye. [1913 Webster]
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