a kind of mechanism for raising water using fire or steam, proposed by Edward Somerset, 2nd Marquess of Worcester (1601–67).

the rotary steam-engine; also figurative.

a form of single-acting condensing steam-engine, used for pumping up water, first used in Cornwall.

a steam engine having a vibrating beam through which the piston effort is transmitted to the crank.

a steam winding engine.

In a vessel: an engine that drives one or more screw propellers. Now rare and only in historical contexts.

a small steam-engine, usually for subsidiary operations on board ship, as feeding the boilers of the propelling engines, etc.; hence donkey-boiler.

the use of four stages of expansion in a compound steam engine, the same steam expanding successively in four cylinders; usually attributive.

a steam engine with two cylinders one in front of the other, the two pistons working on a common piston-rod.

Involving flow in one direction only; spec. applied to: (a) a type of reciprocating steam engine in which the steam in the cylinder flows in one…