Rotative engine

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a steam engine in which the reciprocating motion of the piston is transformed into a continuous rotary motion, as by means of a connecting rod, a working beam and crank, or an oscillating cylinder.

See also: Rotative

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
It was Boulton who saw the potential growth of the cotton-spinning industry and urged Watt to develop a rotative engine which drove yet more sales after it was completed in 1781.
Also in this section is a replica of a 1788 rotative engine, one of the first James Watt steam engines used in a factory.
4 Steam Up Events: Every weekend you can see either the Cornish or rotative engines in the collection in action, demonstrating their power.