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Converted into glass.

Half or imperfectly vitrified; partially converted into glass.

A clinker; a partially vitrified brick.

Partly burned or vitrified coal, or other combustible, in which fire is extinct.

Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag.

The act or process of devitrifying, or the state of being devitrified. Specifically, the conversion of molten glassy matter into a stony mass by slow cooling, the result being the formation of crystallites, microbites, etc., in the glassy base, which are then called devitrification products.

A vitrified sand tube produced by the striking of lightning on sand; a lightning tube; also, the portion of rock surface fused by a lightning discharge.

Not admitting of being vitrified, or converted into glass. Kirwan.

A semivitrified clay or shale, somewhat resembling jasper; -- called also porcelain jasper.

A tube of vitrified sand, produced by a stroke of lightning; a fulgurite.

The quality or state of being semivitrified.

The dross, or recrement, of a metal; also, vitrified cinders.

That may be vitrified; vitrifiable.

The act, art, or process of vitrifying; also, the state of being vitrified.

Capable of being vitrified, or converted into glass by heat and fusion; as, flint and alkalies are vitrifiable.