aperture
1. [ noun ] (photography) a device that controls amount of light admitted
Related terms: regulator camera telescope
2. [ noun ] an opening in something
Related terms: hole pupil micropyle stoma eye
3. [ noun ] an opening; usually small
Related terms: opening mouthpiece mouthpiece
Similar spelling:   apart
  apheretic
  aphaeretic
  apertif
  appurtenant
  apportioned
  aperitif