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Meaning of auxiliary power unit | Babel Free

Noun CEFR C1

Definitions

A generator in aircraft or other vehicles for providing electric power to various systems, such as lighting, especially when the main engines are not running.

CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

auxiliary storage auxiliary verb auxin auxinic auxinole auxinome

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