Air equivalent
a measure of the effectiveness of a material in absorbing nuclear radiation, expressed as the thickness of an air layer (at 0° c and 1 atmosphere) causing the same absorption.
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- Air express
an express service for shipping small packages of goods by air: includes ground pickup at origin and delivery at destination. the goods shipped by this service. to send or transport by air express: your package will be air-expressed and should reach its destination tomorrow. pertaining to, using, or sent by air express: your air-express package […]
- Air fern
noun a plant made of the skeletal remains of a species of marine animal, sertularia argentea, which resembles a fern when dyed green and is distantly related to coral; also called neptune plant examples the self-sustaining air fern is only found at the bottom of the english channel. historical examples you certainly do, said nyoda […]
- Airfield
a level area, usually equipped with hard-surfaced runways, on which airplanes take off and land. contemporary examples an empty plot of land lay across the street that led to the airfield, where daily flights left for sierra leone and guinea. my vanished liberia leymah gbowee october 6, 2011 safwan—an iraqi airfield just over the border […]
- Air filter
noun another name for air cleaner
- Air fleet
a group of military aircraft, usually under one commander. historical examples over new york and its bay the american air fleet was in motion. when the sleepers woke arthur leo zagat we’re through their air fleet, and we’ve left a trail of fire! the guns of europe joseph a. altsheler one thing in our favor […]