(Italian, “excavation”) A technique involving the application, to the surface of an object, of substances that, when heated to about 1470°F (800°C), fuse and create an effect similar to weathering, thereby imitating glass from an archeological excavation.

(German) A type of drinking glass with a short cylindrical neck, a hemispherical body, and a single handle that projects outward and upward from the wall.

(German, “enamel glass”) A term applied to several types of decorative glassware, including calcedonio and opaque white glass with a red overlay applied by flashing. It does not refer to glass decorated with enamel.

(German, “black lead”) A sepia enamel first used in painting stained glass and later applied to glass vessels, either by itself or in combination with other enamels or gold.

Its many meanings include an emblem impressed on wax or some other plastic substance as evidence of ownership or authenticity. Since the 17th century, many bottles have borne stamped glass seals that identify the producer of the contents, the tavern in which they were used, or the individual for

A slight, narrow ridge on a glass object, which indicates that it has been made in a mold. The seams appear where gaps in the joins between parts of the mold have permitted molten glass to seep during formation. On well-made pieces, the seam marks are usually smoothed away by grinding or fire

Minute bubbles of gas, usually occurring in groups.

A matching set of tableware.

Slivers of waste glass formed by trimming glassware during manufacture.

Slivers of waste glass formed by trimming glassware during manufacture.