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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

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