1. (noun) a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine

• ice

1. (noun) a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine

• diesel
• diesel engine
• diesel motor
• four-stroke engine
• four-stroke internal-combustion engine
• gas engine
• gasoline engine
• petrol engine
• outboard
• outboard motor
• radial engine
• rotary engine
• reciprocating engine
• rotary engine
• valve-in-head engine

1. (noun) a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine

• heat engine