Dictionary.com

mydriasis

[ mi-drahy-uh-sis, mahy- ]
/ mɪˈdraɪ ə sɪs, maɪ- /

noun Medicine/Medical.

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

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Compare miosis.

Origin of mydriasis

1650–60; <Latin mydriāsis<Greek mydríāsis

Words nearby mydriasis

mycotoxin, mycotrophic, mycotrophy, My country, 'tis of thee, mycovirus, mydriasis, mydriatic, myectomy, myectopy, myel-, myelapoplexy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for mydriasis

British Dictionary definitions for mydriasis

mydriasis
/ (mɪˈdraɪəsɪs, maɪ-) /

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

Medical definitions for mydriasis

mydriasis
[ mĭ-drī′ə-sĭs ]

n.

Prolonged abnormal dilation of the pupil of the eye induced by a drug or caused by disease.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.