(n.) An engine moved by steam.

AC motor Corliss engine Otto engine Wankel engine aeromotor air engine alembic anvil apparatus appliance arc-jet engine axial-flow turbojet beam engine bearings blowing engine boiler caldron cam cam engine camshaft capacitor motor commutator motor compensated motor compound motor condensing engine connecting rod convenience crankcase crankshaft crucible cylinder cylinder head diagonal engine differential direct-acting engine donkey engine drive dynamo dynamotor electric motor enginery facility fire engine fixture flywheel gas jet gas turbine engine gearbox gears generator hot-air engine hydraulic engine hydro-jet impulse duct engine inverted engine ion engine ion rocket jet lathe locomotive machine machinery mechanical aid mechanical device mechanism melting pot mortar motive power motor outboard motor pancake engine piston piston engine piston rod piston-valve engine plasma engine portable engine power plant power source propeller-jet engine propjet pulse-jet engine pumping engine radial engine ramjet ramjet engine reciprocating engine refrigerating engine resojet engine retort rocket engine rocket motor rotary engine rotary-piston engine rotor motor servomotor shunt motor steam engine supercharged engine synchronous motor test tube three-phase motor traction engine transducer transformer transmission turbine turbojet turbojet engine turboprop utility variable-speed motor vernier engine vertical engine