an optical glass of low dispersion and generally low index of refraction.
an old form of window glass formed by blowing a globe and whirling it into a disk.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use crown glass in a sentence
In making crown-glass, which is used for windows, a slight alteration in the process is observed.
The focal length of double convex lenses of crown glass is about the same as the radius of curvature of either surface.Physics | Willis Eugene Tower
The achromatic lens consists of a double convex lens of crown glass combined with a plano-concave lens of flint glass.Physics | Willis Eugene Tower
English crown-glass; excellent quality, but not so white as the last.
Such a mixture will produce a dull metal, very attractive of moisture: defects to which the French crown-glass also is subject.A Dictionary of Arts, Manufactures and Mines | Andrew Ure
British Dictionary definitions for crown glass
another name for optical crown
an old form of window glass made by blowing a globe and spinning it until it formed a flat disc
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