aperture

Meanings

1. 1
   noun

   A small or narrow opening, gap, slit, or hole.

   An aperture in a wall.

2. 2
   noun

   The maximum angle between the two generatrices.

   If the generatrix makes an angle θ to the axis, then the aperture is 2θ.

3. 3
   noun

   an man-made opening

4. 4
   noun

   a device that controls amount of light admitted

Simplified etymology

Aperture, recorded in late Middle English, comes from Latin apertura, derived from aperire “to open.”

From late Middle English, from Latin apertūra (“an opening”), from aperiō (“to uncover, make or lay bare”) + -tūra (“-ure”, action noun suffix). Doublet of overture and apertura.

Topics

External links

• Google Images
• Cambridge Dictionary
• Wiktionary