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

plural of compound engine

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

plural of dividing engine

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

plural of air engine

An engine put into motion by air expanded by heat.

(historical) A machine for converting rags etc. into pulp.

plural of pulp engine

A machine for cutting straw or hay into chaff.