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[mahy-oh-sis] /maɪˈoʊ sɪs/

noun, plural mioses
[mahy-oh-seez] /maɪˈoʊ siz/ (Show IPA). Medicine/Medical.
excessive constriction of the pupil of the eye, as a result of drugs, disease, or the like.
noun (pl) -ses (-siːz)
excessive contraction of the pupil of the eye, as in response to drugs
a variant spelling of meiosis (sense 1)

1819, from Greek myein “to shut (the eyes)” + -osis. Greek myein is perhaps originally “to close the lips,” from PIE *meue- “to be silent” (see mute (adj.)). Related: Miotic.

miosis mi·o·sis or my·o·sis (mī-ō’sĭs)
n. pl. mi·o··ses (-sēz)


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