Link Centre Dictionary

mydriasis

myd·ria·sis

UK/mɪˈdɹaɪ ə sɪs/ US/maɪ-/ uncommon

noun

1.

reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs

Origin

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.

Related words

Broader terms

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.