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

An instrument made of convex glass, used to magnify.

plural of looking glass

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

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

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.

Of or like glass, especially in being smooth and somewhat reflective. / Including a lot of glass. / Dull; expressionless. / (surfing, of water, not comparable) Lacking any chop; smooth and mostly flat.

(Ulster) Glass marble.

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

A greenhouse, especially one for commercial use. / A building where glass or glassware is manufactured. / (Britain military slang) A military prison.