Look up aperture in Wiktionary, the free dictionary.

An aperture is an opening, in particular one whose size determines what can or cannot pass through. The term can in particular refer to:

• Aperture of an optical system, the opening that limits the amount of light that can pass through
• Aperture (computer memory), a region of the physical address space that opens access to a particular device or memory unit
• Synthetic aperture, a method in radioastronomy and radar measurements
• Aperture (antenna), a physical parameter of an antenna
• Aperture (mollusc), the main opening in the shell of a gastropod or scaphopod (mollusc)
• Aperture (botany), a weaker spot in the wall of a pollen grain
• Aperture (magazine), a long-running art photography magazine
• Aperture (photography software), an image organization and editing program for photographers, sold by Apple inc.

[edit] See also

• Aperture problem, an ambiguity of motion direction
• Aperture grille, a prominent cathode ray tube display technology
• Numerical aperture is a parameter used to describe optical systems

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