Medical Dictionary
aperture
noun ap·er·ture
\ˈap-ə(r)-ˌchu̇(ə)r, -chər, -ˌt(y)u̇(ə)r\
\ˈap-ə(r)-ˌchu̇(ə)r, -chər, -ˌt(y)u̇(ə)r\
Medical Definition of APERTURE
1
: an opening or open space
2
: the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument
Seen & Heard
What made you want to look up aperture? Please tell us where you read or heard it (including the quote, if possible).