Turbine engine air used for air-conditioning and pressurization is generally called?

The term used to describe turbine engine air utilized for air-conditioning and pressurization is "bleed air." This refers to compressed air that is extracted from various stages of the engine's compressor section. Bleed air is essential for various aircraft systems, including environmental control systems that regulate cabin pressure and temperature, as it is already at high pressure and temperature, making it suitable for these applications.

Bleed air is typically drawn from the high-pressure compressor stage of the engine, and it is cooled and conditioned before being supplied to the cabin or other systems. This makes it an efficient source of conditioned air for maintaining the appropriate cabin atmosphere during flight.

In contrast, exhaust air refers to the air expelled from the engine after combustion, supply air denotes the air entering a system, and bypass air typically refers to air that flows around the engine core rather than through it. Hence, "bleed air" is the specific terminology that accurately describes the air used for air-conditioning and pressurization in turbine engines.