miosis

noun

mi·​o·​sis mī-ˈō-səs How to pronounce miosis (audio)
mē-
variants or less commonly myosis
plural mioses also myoses mī-ˈō-ˌsēz How to pronounce miosis (audio)
: excessive smallness or contraction of the pupil of the eye

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

Time Traveler
The first known use of miosis was in 1807

Dictionary Entries Near miosis

Cite this Entry

“Miosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/miosis. Accessed 29 Nov. 2022.

Medical Definition

miosis

noun

mi·​o·​sis
variants also myosis
plural mioses also myoses -ˌsēz How to pronounce miosis (audio)
: excessive smallness or contraction of the pupil of the eye
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
Name That Thing

You know what it looks like… but what is it called?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ