Medical Dictionary

sphincter pupillae

noun sphincter pu·pil·lae \-pyü-ˈpil-ē\

Definition of SPHINCTER PUPILLAE

:  a broad flat band of smooth muscle in the iris that surrounds the pupil of the eye
March 30, 2015
amphibology Hear it
A phrase with more than one interpretation
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears