A textured cylinder glass of uneven thickness, used primarily in stained glass windows; similar in characteristics to the stained glass of the Middle Ages.

To provide a hard, noncorrosive, electrolytic, oxide film on the surface of a metal, particularly aluminum, by electrolytic action.

The surface finish resulting from anodizing; may be transparent or colored by the use of a dye or pigment in the anodizing process.

In an electric system to protect underground iron pipes or structures from electrochemical action, a metallic rod which is driven in the ground; direct current is passed through the rod to the earth, and then through the iron pipe or structure, in a direction opposite to that resulting from the electrochemical properties of the soil.

A signaling device, usually electrically operated, that emits an audible signal and/or a visual indication under selected circumstances; for example, it may sound an alarm in the case of fire or unauthorized entry.

A small molding, usually circular in plan and square or angular in section; esp. one of the fillets encircling the lower part of the Doric capital above the necking.

A shaft or cluster of shafts fitted, at intervals, with rings.

A barrel vault in the shape of a ring, instead of a straight line; covers a space of which the plan is formed by the area between two concentric circles, or any portion of such a space

A nail with circular ridges around its shaft; provides greater holding power than a nail without such ridges.

Any molding that is circular in plan, such as the torus at the base of a column.