n. A finely ground relatively pure form of silicas used as a paint filler etc.
the GNU version of the Collaborative International Dictionary of English
n. Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See silica, and silicic.
The Century Dictionary and Cyclopedia
n. Same as silica.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a pure form of finely ground silica
n. a vacuum coffee maker
Word Usage
"Other stones, such as silex, for making glass, etc., are found in profusion in various parts of the country, but we have no space to enter into a detailed account of them at present."