- Optics. glass that has had its polished surface removed by fine grinding and that is used to diffuse light.
- glass that has been ground into fine particles, especially for use as an abrasive.
Origin of ground glass
First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ground glass
Why do you have ground-glass windows on this side of the house?Cap'n Eri
Joseph Crosby Lincoln
He fumbled for his key, found it, and opened the ground-glass door.Pagan Passions
Gordon Randall Garrett
But there was no way of seeing them—through the ground-glass windows.The Crime of Sylvestre Bonnard
At the rear is a ground-glass screen, B, to catch the image.How it Works
The curry is stuffed with rhubarb, and the ice with ground-glass.Margaret Capel, v. 3 of 3
- glass that has a rough surface produced by grinding, used for diffusing light
- glass in the form of fine particles produced by grinding, used as an abrasive
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