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Noun: mydriasis  mi'drI-u-sis
  1. Reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs

Type of: dilatation, dilation, inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex

Encyclopedia: Mydriasis