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.

Nearby words

  1. mycotoxicosis,
  2. mycotoxin,
  3. mycotrophic,
  4. mycotrophy,
  5. mycovirus,
  6. mydriatic,
  7. myectomy,
  8. myectopy,
  9. myel-,
  10. myelapoplexy

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

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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

Medicine definitions for mydriasis

mydriasis

[ mĭ-drīə-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.