miosis

noun
mi·​o·​sis | \ mī-ˈō-səs How to pronounce miosis (audio) , mē- \
variants: or less commonly
plural mioses also myoses\ mī-​ˈō-​ˌsēz How to pronounce miosis (audio) \

Definition of miosis

: excessive smallness or contraction of the pupil of the eye

First Known Use of miosis

1807, in the meaning defined above

History and Etymology for miosis

New Latin, from Greek myein to be closed (of the eyes) + New Latin -osis

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Cite this Entry

“Miosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/miosis. Accessed 6 May. 2021.

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More Definitions for miosis

miosis

noun
mi·​o·​sis
variants: also myosis \ mī-​ˈō-​səs How to pronounce miosis (audio) , mē-​ How to pronounce miosis (audio) \
plural mioses also myoses\ -​ˌsēz How to pronounce miosis (audio) \

Medical Definition of miosis

: excessive smallness or contraction of the pupil of the eye

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