Mydriasis

//mɪˈdɹaɪ ə sɪs// noun

Definitions

Noun
  1. 1
    The condition of having abnormally large and dilated pupils due to illness or narcotics, particularly stimulants such as methamphetamine, cocaine, etc. countable, uncountable
  2. 2
    reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs wordnet

Etymology

From Latin mydriasis, from Ancient Greek μυδρίᾱσις (mudríāsis, “undue enlargement of the pupil”), from μύδρος (múdros, “mass of red hot material in a forge”), possibly because the pupil is particularly bright or sparkling when dilated, or because of the red eye effect when exposed to a flash of light.

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