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Meaning of ground glass

ground' glass'

Pronunciation: [key]
  1. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
ground fog ground hemlock