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afterburner a device for burning partially burned carbon compounds in the exhaust fumes of an internal-combustion engine. [1/2 definitions]
carburetor a device in an internal-combustion engine that produces a combustible mixture of vaporized fuel and air.
choke to enrich the fuel mixture of (an internal-combustion engine) by reducing the flow of air to the carburetor. [1/9 definitions]
compression ratio in an internal-combustion engine, the ratio of the largest to the smallest volume of a cylinder measured at the top and bottom of the piston stroke.
cylinder head of the cylinder in an internal-combustion engine, the closed, often detachable end opposite to that from which the piston or connecting rod projects.
diesel shortened form of "diesel engine," a type of internal-combustion engine that burns fuel oil which is ignited by being sprayed into a chamber in which highly compressed air, rather than an electric spark, provides the heat. [1/3 definitions]
diesel engine a type of internal-combustion engine that burns fuel oil which is ignited by being sprayed into a chamber in which highly compressed air, rather than an electric spark, provides the heat.
gasoline a volatile, flammable liquid of hydrocarbons, derived from petroleum and used primarily as fuel for internal-combustion engines.
petrol (chiefly British) a volatile, flammable liquid of hydrocarbons, derived from petroleum and used primarily as fuel for internal-combustion engines; gasoline.
preignition in an internal-combustion engine, the ignition of fuel before the spark plug fires.
spark plug a device threaded into the cylinder of an internal-combustion engine that produces sparks that ignite fuel. [1/2 definitions]
turbocharger a device attached to an internal-combustion engine that uses the exhaust gases to power a turbine that drives a supercharger that supplies compressed air to the cylinders.
two-stroke of or designating an internal-combustion engine in which two strokes of a piston complete a fuel cycle.
water jacket a casing containing water, used for cooling, esp. an internal-combustion engine.