(obsolete) A glass that displays objects; a mirror.

(archaic, medicine) A glass vessel used in cupping.

A kind of early telescope. / (historical) An instrument for viewing an enlarged image of engraved prints or maps http://www.monticello.org/site/research-and-collections/perspective-glass.

plural of glass cutter

The neutral salt skimmed from the surface of melted crown glass.

glass ornamented with figures on a dull ground

(usually uncountable) opaque glass, especially the kind having a white shade / (countable) a drinking glass intended or currently used for milk

A type of opaque, translucent glass.

Glass in the form of flat sheets, made by floating molten glass on the surface of molten metal; currently the main method of producing window glass.

Glass containing lead oxide, used for its high refractive index (often in cut glass) or for its ability to block ionizing radiation.