noun
Freq #39559
Meanings
-
1
noun
A small or narrow opening, gap, slit, or hole.
An aperture in a wall.
-
2
noun
The maximum angle between the two generatrices.
If the generatrix makes an angle θ to the axis, then the aperture is 2θ.
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3
noun
an man-made opening
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4
noun
a device that controls amount of light admitted
Thesaurus
Word family
Derived forms
apertometeraperturalaperturateaperture-priorityaperturedaperturelessectoapertureendoaperturemacroaperturemultiaperturenanoaperturesubaperture
Related forms
aperientaperitiveapertapertionapertly
Etymology
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.