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The recrement of metals in fusion, or the slag rejected after the eduction of metallic ores; dross.

Scoriaceous. E. A. Poe.

Of or pertaining to scoria; like scoria or the recrement of metals; partaking of the nature of scoria.

See Escurial.

The slag of a furnace, or scoriaceous lava from a volcano. Cinder frame, a framework of wire in front of the tubes of a locomotive, to arrest the escape of cinders. -- Cinder notch (Metal.), the opening in a blast furnace, through which melted cinder flows out.

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.

A volcanic rock, formed by the cementing together of sand, scoria, cinders, etc.

A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called…

Superfluous matter separated from that which is useful; dross; scoria; as, the recrement of ore.

In the form of scoria.

To reduce to scoria or slag; specifically, in assaying, to fuse so as to separate the gangue and earthy material, with borax, lead, soda, etc., thus leaving the gold and silver in a lead button; hence, to separate from, or by means of, a slag.

Scoriaceous. Sir T. Browne.

iquids in boiling or fermentation, or which form on the surface by other means; also, the scoria of metals in a molten state; dross. Some to remove the scum it did rise. Spenser.

The scoria of a volcano. Slag furnace, or Slag hearth (Metal.), a furnace, or hearth, for extracting lead from slags or poor ore. -- Slag wool, mineral wool. See under Mineral.

The scoria on the surface of molten metal in the ladle.

A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.

roduced from the discharges of volcanic matter, as the various kinds of basalt, trachyte, scoria, obsidian, etc., whether compact, scoriaceous, or vitreous.