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ground glass

 - 2 dictionary results

ground glass

–noun
1. Optics. glass that has had its polished surface removed by fine grinding and that is used to diffuse light.
2. glass that has been ground into fine particles, esp. for use as an abrasive.

Origin:
1840–50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To ground glass
ground glass  
n.  
  1. Glass that has been ground or etched to create a roughened nontransparent surface.

  2. Glass that has been ground into fine particles, as for use as an abrasive.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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