Medical Dictionary


noun ap·er·ture
\ˈap-ə(r)-ˌch(ə)r, -chər, -ˌt(y)(ə)r\

Medical Definition of APERTURE

:  an opening or open space
:  the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument
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