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noun
1.
an opening, as a hole, slit, crack, gap, etc.
2.
Also called aperture stop. Optics. an opening, usually circular, that limits the quantity of light that can enter an optical instrument.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Apertures
is always a great word to know.
So is slumgullion. Does it mean:
| a chattering or flighty, light-headed person. |
| a stew of meat, vegetables, potatoes, etc. |
Etymonline
Word Origin & History
aperture
1640s, from L. apertura "an opening," from apertus, pp. of aperire "to open" (see overt).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
aperture ap·er·ture (āp'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.
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.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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