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aperture

[ ap-er-cher ]
/ ˈæp ər tʃər /
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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.
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Origin of aperture

1400–50; late Middle English <Latin apertūra an opening, equivalent to apert(us) opened (past participle of aperīre; aper(i)- (see aperient) + -tus past participle suffix) + -ūra-ure

OTHER WORDS FROM aperture

ap·er·tur·al [ap-er-choor-uhl], /ˈæp ərˌtʃʊər əl/, adjectiveap·er·tured, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use aperture in a sentence

British Dictionary definitions for aperture

aperture
/ (ˈæpətʃə) /

noun
a hole, gap, crack, slit, or other opening
physics
  1. a usually circular and often variable opening in an optical instrument or device that controls the quantity of radiation entering or leaving it
  2. 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
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