crown glass
Americannoun
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an optical glass of low dispersion and generally low index of refraction.
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an old form of window glass formed by blowing a globe and whirling it into a disk.
noun
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another name for optical crown
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an old form of window glass made by blowing a globe and spinning it until it formed a flat disc
Etymology
Origin of crown glass
First recorded in 1700–10
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"We've looked everywhere and can't find anyone that can cast crown glass," he said.
From BBC ● Oct. 23, 2017
An optical fiber uses flint glass clad with crown glass.
From Textbooks ● Aug. 12, 2015
Find the range of visible wavelengths of light in crown glass.
From Textbooks ● Aug. 12, 2015
At what angle is light inside crown glass completely polarized when reflected from water, as in a fish tank?
From Textbooks ● Aug. 12, 2015
The floor and stand, the frame and joints must be strong and compact, and the walls of plate or thick crown glass.
From The Atlantic Monthly, Volume 08, No. 47, September, 1861 by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
