supercharger
noun
su·per·charg·er
ˈsü-pər-ˌchär-jər
: a device (such as a blower or compressor) for pressurizing the cabin of an airplane or for increasing the volume air charge of an internal combustion engine over that which would normally be drawn in through the pumping action of the pistons
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Merriam-Webster unabridged
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