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compressed air
(Encyclopedia)compressed air, air whose volume has been decreased by the application of pressure. Air is compressed by various devices, including the simple hand pump and the reciprocating, rotary, centrifugal, and...air transportation
(Encyclopedia)air transportation: see aviation. ...plein-air
(Encyclopedia)plein-air plān-ârˈ, Fr. plĕn-ĕrˈ [key] [Fr.,=open-air], term used for paintings or drawings made directly from nature and infused with a feeling of the open air. Painting outdoors is a relativel...air bag
(Encyclopedia)air bag: see automobile.air bladder
(Encyclopedia)air bladder, in fish: see swim bladder. ...air brake
(Encyclopedia)air brake: see brake.air cargo
(Encyclopedia)air cargo: see aviation.air conditioning
(Encyclopedia)CE5 Cross section of air conditioning unit. air conditioning, mechanical process for controlling the humidity, temperature, cleanliness, and circulation of air in buildings and rooms. Indoor air i...air embolism
(Encyclopedia)air embolism: see embolus.air lock
(Encyclopedia)air lock, compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have air locks to enab...Browse by Subject
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