mydriasis

Từ điển WordNet v3.1 - WordNet Dictionary

noun

reflex pupillary dilation as a muscle pulls the iris outward;
occurs in response to a decrease in light or certain drugs
• Hypernyms:
reflex, reflex response, reflex action, instinctive reflex, innate reflex,
inborn reflex, unconditioned reflex, physiological reaction, dilation, dilatation