crown glass

  1. an optical glass of low dispersion and generally low index of refraction.
  2. 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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for crown glass

Historical Examples of crown glass

British Dictionary definitions for crown glass

crown glass

  1. another name for optical crown
  2. 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