silex

noun

Silica.

noun

Finely ground tripoli used as an inert paint filler.

noun

Same as silica.

noun

Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See silica, and silicic.

noun

Flint.

noun

A finely ground relatively pure form of silicas used as a paint filler etc.

noun

a pure form of finely ground silica

noun

a vacuum coffee maker