engine breather

The vent for the crank case of a reciprocating engine. It allows fumes to escape from the crankcase and prevents a pressure buildup inside the engine.

Aviation dictionary. 2014.

Look at other dictionaries:

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  • air-breather — /air bree dheuhr/, n. an aircraft, missile, or submarine engine that requires air from the atmosphere for the combustion of its fuel. Also, airbreather. * * * …   Universalium

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