gas turbine: turbine that converts the chemical energy of a liquid fuel into mechanical energy by internal combustion; gaseous products of the fuel (which is burned in compressed air) are expanded through a turbine
turbine: rotary engine in which the kinetic energy of a moving fluid is converted into mechanical energy by causing a bladed rotor to rotate
nonproliferation: the prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons)