What is Glass?

Definition of Glass

A hard, brittle, translucent, and commonly transparent substance, white or coloured, having a conchoidal fracture, and made by fusing together sand or silica with lime, potash, soda, or lead oxide. It is used for window panes and mirrors, for articles of table and culinary use, for lenses, and various articles of ornament.

Glass is variously coloured by the metallic oxides; thus, manganese colours it violet; copper (cuprous), red, or (cupric) green; cobalt, blue; uranium, yellowish green or canary yellow; iron, green or brown; gold, purple or red; tin, opaque white; chromium, emerald green; antimony, yellow.

Other Glass definitions

Glass is much used adjectively or in combination; as, glass maker, or glassmaker; glass making or glassmaking; glass blower or glassblower, etc. Bohemian glass, Cut glass, etc.

Crown glass, a variety of glass, used for making the finest plate or window glass, and consisting essentially of silicate of soda or potash and lime, with no admixture of lead; the convex half of an achromatic lens is composed of crown glass; so called from a crownlike shape given it in the process of blowing.

Crystal glass, or Flint glass. See Flint glass, in the Vocabulary. Cylinder glass, sheet glass made by blowing the glass in the form of a cylinder which is then split longitudinally, opened out, and flattened. Glass of antimony, a vitreous oxide of antimony mixed with sulphide.

Glass blower, one whose occupation is to blow and fashion glass.

Glass blowing, the art of shaping glass, when reduced by heat to a viscid state, by inflating it through a tube. Glass cloth, a woven fabric formed of glass fibres. 

Glass cutter. One who cuts sheets of glass into sizes for window panes, ets. One who shapes the surface of glass by grinding and polishing. A tool, usually with a diamond at the point, for cutting glass.

Glass cutting. The act or process of dividing glass, as sheets of glass into panes with a diamond. The act or process of shaping the surface of glass by appylying it to revolving wheels, upon which sand, emery, and, afterwards, polishing powder, are applied; especially of glass which is shaped into facets, tooth ornaments, and the like.