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miosis

American  
[mahy-oh-sis] / maɪˈoʊ sɪs /
Or myosis

noun

Medicine/Medical.

plural

mioses

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

miosis British  
/ maɪˈəʊsɪs, maɪˈɒtɪk /

noun

  1. excessive contraction of the pupil of the eye, as in response to drugs

  2. 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

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.