An instrument made of convex glass, used to magnify.

An aircraft cockpit with its avionics displayed on computer screens, rather than on gauges.

A field glass used at horseraces, usually as a pair (binoculars).

In amorphous materials, gradual and reversible transition from a hard and relatively brittle "glassy" state into a viscous or rubbery state (or opposite) over a range of temperature range.

A slightly convex mirror, commonly of black glass, once used by artists to view landscapes and produce works similar to those of Claude Lorrain.

(inorganic chemistry) Any of several inorganic polymers of sulphur, selenium and tellurium, that are transparent to infrared radiation and are used in optics.

(horticulture, literally) In a greenhouse, a cold frame, or a similar structure; said of the propagation and growth of plants. / In a glass case, like an item in a museum. / (idiomatic, slang) In jail.

(dated) Synonym of mirror (“smooth surface that reflects light so as to give an image of what is in front of it”).

A heat-resistant glass made with the addition of boric oxide.

A small glass used to hold or measure a small quantity of liquor.