miosis

noun

mi·​o·​sis mī-ˈō-səs 

mē-

variants or less commonly myosis

plural mioses also myoses mī-ˈō-ˌsēz 

: excessive smallness or contraction of the pupil of the eye

Examples of miosis in a Sentence

Recent Examples on the Web

If miosis may be related to eye inflammation, infection, or a side effect from medication, see a primary care provider or an eye specialist to evaluate the condition. —Maxine Lipner, Verywell Health, 19 Mar. 2025

Word History

Etymology

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

First Known Use

1807, in the meaning defined above

Rhymes for miosis

• cirrhosis
• fibrosis
• gliosis
• hypnosis
• ichthyosis
• ketosis
• kurtosis
• lordosis
• meiosis
• mitosis
• mycosis
• narcosis

Medical Definition

miosis

noun

mi·​o·​sis

variants also myosis

mī-ˈō-səs  mē- 

plural mioses also myoses -ˌsēz 

: excessive smallness or contraction of the pupil of the eye