Turbocharger
An exhaust-driven air compressor used to increase the power of a reciprocating engine. A turbocharger uses a small radial inflow turbine in the exhaust system to drive a centrifugal-type air compressor on the turbine shaft. The compressed air is directed into the engine cylinders to increase power.
Aviation Maintenance Technician Handbook — Powerplant, p. G-29
Also defined in 1 more source
An air compressor driven by exhaust gases, which increases the pressure of the air going into the engine through the carburetor or fuel injection system.
Taught in PP-J Concepts, PP-J Procedures, PP-J Quick reference.