A blue paste made from Prussian blue and some oily substance, used to verify the mating of components by rubbing a coated workpiece against the target surface to leave marks.

A kind of steam engine in which the steam is admitted only to the underside of the piston.

plural of electrical engineer

Someone who specializes in electrical engineering.

An engine in which motion is communicated to the piston by the alternate admission and condensation of gas in a closed cylinder.

plural of engine turning

An ornamental design made by a rose engine, for example on the back of a watch.

A condensing engine in which the mechanical action of the steam begins in one cylinder and ends in a larger cylinder.

(historical) An instrument for graduating the scales of scientific apparatus.

An engine put into motion by air expanded by heat.