miosis

American

[mahy-oh-sis] / maɪˈoʊ sɪs /

Or myosis

noun

Medicine/Medical.

PLURAL

mioses

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

miosis British

/ maɪˈəʊsɪs, maɪˈɒtɪk /

noun

excessive contraction of the pupil of the eye, as in response to drugs
a variant spelling of meiosis

"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

Other Word Forms

miotic adjective

Etymology

Origin of miosis

1810–20; variant of myosis < Greek mý ( ein ) to shut (the eyes) + -ōsis -osis

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One doctor working from the Daraya medical center said 75 victims were treated for symptoms including “muscle spasms, bronchial spasms, headaches, dizziness, vomiting, and miosis” following a 1 a.m. rocket strike.

From Newsweek

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023