A mechanical lift for raising or lowering people through considerable distances; specifically (mining) a contrivance by which miners ascend or descend in a shaft. It consists of a series of landings in the shaft and an equal number of shelves on a vertical rod which has an up and down motion equal to the distance between the successive landings. A man steps from a landing to a shelf and is lifted or lowered to the next landing, upon which he then steps, and so on, travelling by successive stages.

A vertical back-acting steam engine having the cylinder beneath the crosshead.

(mining) An engine used for pumping, raising heavy weights, etc.

A machine, or an appendage to a turning lathe, by which a surface or wood, metal, etc., is engraved with a variety of curved lines.

(historical) A wheelbarrow tank and pump for watering gardens.

A locomotive going in advance of a train to make sure that the way is clear.

An aeolipile.

plural of Hero engine

(thermodynamics) A theoretical engine that converts information into energy for use in work, decreasing heat entropy in the process. / (data processing) A data processor.

A standalone machine that combines an electrical generator with an engine.