The art of making objects from molten glass, especially by manipulating a lump of molten glass on the end of a tube whilst blowing into it.

A person skilled in the art of glassblowing.

A secretory organ, at the base of a bird's tail, that secretes the oil used in preening.

(historical) An eyeglass with or without a handle; a monocle.

(chemistry, physics) Any of several electrodes, having a thin glass bulb, whose potential is dependent upon the concentration of hydrogen or other ions in the solution in which it is immersed; used in pH meters etc.

The amount that a glass will hold.

(obsolete) glassy; shining like glass.

(pathology) Mononucleosis.

(plural only, US, military slang) The brown-framed prescription eyeglasses issued to new recruits in the U.S. military, and perceived as notoriously unattractive.

A tall narrow mirror, usually set between two windows, above a pier table.