Something which guides a tool or the work operated upon; spec. (in Oval-turning) (see quots. 1680 1877); (in Iron-rolling) (see quot. 1881); (in Su…

A line drawn, marked, or placed as a guide, e.g. in positioning a tool or producing a drawing; a constructed line used for guidance.

Something which guides. see quot. 1825 and guide, n. 6b.

In plural. Mechanics. Parallel sills forming a track along which a planing machine, lathe, etc., moves.

Technical senses. In various machine tools: the base of a slide rest, drilling head, etc., which slides along its support.

Engineering. A device or apparatus which, when fed with a set of datum points defining a curve, produces a continuous output for guiding a tool over…