aperture
[ ap-er-cher ]
/ ˈæp ər tʃər /
noun
an opening, as a hole, slit, crack, gap, etc.
Also called aperture stop. Optics. an opening, usually circular, that limits the quantity of light that can enter an optical instrument.
Words nearby aperture
Origin of aperture
OTHER WORDS FROM aperture
ap·er·tur·al [ap-er-choo r-uh l] /ˈæp ərˌtʃʊər əl/, adjectiveap·er·tured, adjectiveDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Examples from the Web for aperture
British Dictionary definitions for aperture
aperture
/ (ˈæpətʃə) /
noun
a hole, gap, crack, slit, or other opening
physics
- a usually circular and often variable opening in an optical instrument or device that controls the quantity of radiation entering or leaving it
- the diameter of such an openingSee also relative aperture
Word Origin for aperture
C15: from Late Latin apertūra opening, from Latin aperīre to open
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for aperture
aperture
[ ăp′ər-chər ]
n.
An opening, such as a hole, gap, or slit.
A usually adjustable opening in an optical instrument, such as a microscope, a camera, or a telescope, that limits the amount of light passing through a lens or onto a mirror.
The diameter of such an opening.
The diameter of the objective of a telescope or microscope.
Other words from aperture
ap′er•tur′al adj.The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.