aperture
Concise Oxford English Dictionary © 2008 Oxford University Press:
aperture /ˈapətʃə, -tj(ʊ)ə/
▶noun an opening, hole, or gap.
■ the variable opening by which light enters a camera.
– origin ME: from L. apertura, from apert-, aperire ‘to open’.
'aperture' also found in these Oxford entries:
bar tracery
- breechblock
- camera obscura
- diaphragm
- diffraction
- dilator
- exposure
- f-number
- gate valve
- hole
- iris
- lunette
- mascle
- operculum
- osculum
- overture
- patent
- pinhole camera
- reeve
- reveal
- slide valve
- slot
- splay
- stop
- triton
- varix
- ventilator
