timber dried naturally by contact with the open air.
(of an aircraft) meeting established standards for safe flight; equipped and maintained in condition to fly. Contemporary Examples The FAA will have to certify SpaceShipTwo as airworthy, but there are as yet no protocols in place for that process. Tycoons in Space: One in Orbit and One Still Grounded Clive Irving October 4, 2014 Historical […]
- Air-bone gap
air-bone gap air-bone gap n. The difference between the threshold for hearing acuity by bone conduction and by air conduction.
(of an engine, aircraft, missile, etc.) to take in air from the atmosphere to oxidize the fuel for combustion. Historical Examples It is known that the swimming bladder of fishes becomes developed into the lungs of air-breathing vertebrates and man himself. Our Common Insects Alpheus Spring Packard The organs of air-breathing are called, in general, […]
noun (informal) air conditioning