| A | B |
| combustion | chemical process of burning |
| combustion chamber | enclosed container in which fuel and air are burned for the production of energy |
| compression | act of makimg a given volume of gas smaller |
| cycle | recurring series of events |
| fuel | chemical substance used for source of energy |
| lean mixture | mixture of gasoline and air in which there is less fuel and more air |
| magneto | electrical generator that produces power when rotated |
| metering | process of allowing a precise amount of fuel to pass |
| powerplant | airplane engine and accessories |
| reciprocating | type of engine that proceses air and fuel by a back and forth motion of its internal parts |
| rich mixture | mixture of gasoline and air in which there is more gasoline and less air than needed for normal combustion |
| stoichiometric | a ratio of fuel to air in which, upon combustion, all of the fuel is burned |
| stroke | movement of the piston to its limits within the combustion chamber |