ground glass

noun

1. glass that diffuses light due to a rough surface produced by abrasion or etching (Freq. 1)

• Hypernyms: ↑glass

2. particulate glass made by grinding and used as an abrasive

• Hypernyms: ↑glass

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noun

1. : glass whose surface has been made light-diffusing by etching with hydrofluoric acid, sandblasting, or grinding with an abrasive; specifically : a sheet of such glass used as a focusing screen in photography

2. : glass reduced to powder by grinding or crushing for use as an abrasive

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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.

[1840-50]

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ground glass noun

1. Glass fogged by grinding, sandblasting or etching

2. Glass in the form of fine particles, used as an abrasive

• • •

Main Entry: ↑grind

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ground glass,

1. glass with the surface roughened so that it is not transparent.

2. glass that has been ground to powder.

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n.

1) glass with a smooth ground surface that renders it nontransparent while retaining its translucency

2) glass ground into an abrasive powder