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aperture Definition

ap·er·ture (apər c̸hər)

noun

  1. an opening; hole; gap
  2. the opening, or the diameter of the opening, in a camera, telescope, etc. through which light passes into the lens

Etymology: L apertura < apertus, pp. of aperire, to open < IE *ap-wer-, to uncover < base *ap(o)- away + *wer- to close, cover > warn

aperture Synonyms

aperture

n.

opening, fissure, gap; see hole 1, 2.

aperture Usage Examples

Preposition: of

  • f2.8: This new 28-80mm focal length auto-focus zoom provides a constant fast aperture of f2.8 throught its zoom range.

Converse of object

  • splay: The only window has a deeply splayed aperture, the sloping sill utilizing a cross slab; a modern lintel.

Adjective modifier

  • square-headed: South wall: square-headed slit aperture about 3m below the standard belfry window.
  • louvered: Finally, three standard louvered apertures at the top of the wall.
  • numerical: Numerical Aperture The numerical aperture of a microscope objective is a measure of its ability to resolve fine specimen detail.
  • circular: For a circular aperture this should be set to 0.0.
  • rectangular: The audience enter a booth one at a time to watch a three minute performance through a small rectangular aperture.
  • maximum: For grasp, maximum grip aperture and time to maximum grip aperture were measured.

Modifies a noun

  • photometry: The saturation level in the aperture photometry was a constant.
  • diaphragm: The aperture diaphragm is located at the light guide end.
  • telephoto: This large aperture telephoto macro lens enables you to shoot up to 1:1 life size close-ups.
  • radar: The modified Bombardier Global Express is fitted with an active synthetic aperture radar for ground surveillance.
  • grille: These models incorporate the award winning Diamondtron NF ( Natural Flat ) aperture grille CRT.
  • antenna: The effective area is usually ( in the case of an aperture antenna ) somewhat smaller than the physical area.

Noun used with modifier

  • AGP: See the ' How can I change my AGP Aperture size?
  • stencil: The paste flowing into the stencil apertures, filling them.
  • condenser: The condenser aperture controls the fraction of the beam which is allowed to hit the specimen.
  • slit: South wall: square-headed slit aperture about 3m below the standard belfry window.
  • pallet: However the center column shows that the rate of fall was greater for the narrower pallet aperture.
  • lens: You can use the guide number to work out the lens aperture for the correct exposure at any distance.

Browse dictionary entries near aperture

  1. aperitivo
  2. aperitif
  3. aperiodic
  4. aperient
  5. aperçu
  6. Apennines
  7. Apelles
  8. Apeldoorn
  9. apeak
  10. ape-man
  1. apery
  2. apetalous
  3. apex
  4. Apgar score
  5. aph-
  6. aphanite
  7. aphasia
  8. aphelion
  9. apheliotropism
  10. apheresis