- 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.
Origin of crown glass
First recorded in 1700–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for crown glass
Their materials are those used in the crown-glass manufacture.
Crown-glass was easy to work, but flaked off in rather short pieces.Cruise of the 'Alert'
R. W. Coppinger
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.
- 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