English

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Pupil dilated for examination by ophthalmologist.

Etymology

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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.

Pronunciation

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  • IPA(key): /mɪˈdɹaɪ ə sɪs/, /maɪ-/

Noun

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mydriasis (plural mydriases)

  1. (medicine) The condition of having abnormally large and dilated pupils due to illness or narcotics, particularly stimulants such as methamphetamine, cocaine, etc.

Antonyms

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Translations

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See also

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