mydriasis

[mi-drahy-uh-sis, mahy-]

noun Medicine/Medical.

excessive dilatation of the pupil of the eye, as the result of disease, drugs, or the like.

Compare miosis.

Origin of mydriasis

1650–60; < Latin mydriāsis < Greek mydríāsis

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mydriasis

Historical Examples of mydriasis

Mydriasis does not always occur, and when it does, is much less than with cocaine.
Merck's 1899 Manual
Merck & Co.
Visual acuteness on both sides 5/12, the left slightly better than the right; emmetropia in mydriasis by atropine.
Schweigger on Squint
C. Schweigger
Mydriasis, mi-drī′a-sis, n. morbid dilatation of the pupil of the eye.
Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)
Various
At the same time there is a certain amount of mydriasis, but this is less pronounced than that produced by atropine.
Coca and its Therapeutic Application, Third Edition
Angelo Mariani

British Dictionary definitions for mydriasis

mydriasis

noun

abnormal dilation of the pupil of the eye, produced by drugs, coma, etc

Word Origin for mydriasis

C17: via Late Latin from Greek; origin obscure

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mydriasis in Medicine

mydriasis

[mĭ-drī′ə-sĭs]

n.

Prolonged abnormal dilation of the pupil of the eye induced by a drug or caused by disease.