Sin'ter, n.

n. [Ger.] (Min.) Dross, as of iron; the scale which flies from iron when hammered; — applied as a name to various minerals.

Calcareous sinter, a loose variety of carbonate of lime, composed of a series of successive layers, concentric, plain, or undulated, and nearly or quite parallel. It appears under various forms. — Ceramian sinter, a variety of quartz in the form of a tube; fulgurite. See FULGURITE. — Pearl sinter, a variety of opal, of a pearly luster, occurring in globular and botryoidal masses. Dana. — Silicious sinter, a light, cellular or fibrous quartz; especially, a stalactitic, fibrous, cauliflower-like, sometimes compact, concretion deposited by the Geysers of Iceland; — called also quartz sinter. Dana.