Any engine that makes use of heat to do work.

Roget 633: machinery, mechanism, engineering.    instrument, organ, tool, implement, utensil, machine, engine, lathe, gin, mill; air engine, caloric engine, heat engine.    gear; tackle, tackling, rig, rigging, apparatus, appliances; plant, materiel; harness, trappings, fittings, accouterments; barde^†; equipment, equipmentage^†; appointments, furniture, upholstery; chattels; paraphernalia etc. (belongings) 780.    mechanical powers; lever, leverage; mechanical advantage; crow, crowbar; handspike^†, gavelock^†, jemmy^†, jimmy, arm, limb, wing; oar, paddle; pulley; wheel and axle; wheelwork, clockwork; wheels within wheels; pinion, crank, winch; cam; pedal; capstan etc. (lift) 307; wheel etc. (rotation) 312; inclined plane; wedge; screw; spring, mainspring; can hook, glut, heald^†, heddle^†, jenny, parbuckle^†, sprag^†, water wheel.    handle, hilt, haft, shaft, heft, shank, blade, trigger, tiller, helm, treadle, key; turnscrew, screwdriver; knocker.    hammer etc. (impulse) 276; edge tool etc. (cut) 253; borer etc. 262; vice, teeth, etc. (hold) 781; nail, rope etc. (join) 45; peg etc. (hang) 214; support etc. 215; spoon etc. (vehicle) 272; arms etc. 727; oar etc. (navigation) 267; cardiograph, recapper^†, snowplow, tenpenny^†, votograph^†.    ... meer laten zien