General

An electrical conductor having no covering or electrical insulation.

A low arch of a bridge under which barges are transported.

Said of a shank (e.g., that of a nail) which has been provided with repetitive ridges or indentations which may

Two or more wires twisted together with sharp hooks or points (or a single wire furnished with barbs); used for

In medieval construction, a mark cut in a dressed stone to identify the stonecutter.

Soil or rock in place before excavation or blasting .

1. A measure of the volume of a mass of soil or rock, before excavation, in its natural position. 2.