Aircraft Carrier. Warship specially designed so that aircraft can take off and alight upon her.
Air Density. Weight of air of a given pressure and in a given volume at a given temperature. At temperature 273°A, pressure 1000mb, density is 0.001276 grammes per cubic centremetre.
Air Mass. Meteorological term for a mass of atmosphere that is bounded by fronts and differs from surrounding atmosphere.
Air Meter. Small portable anemometer, on windmill principle, for measuring wind-speed.
Air Pipe. Pipe that allows air to escape as a tank is filled. 2. Pipe through which air is pumped to a diver.
Air Pocket. Descending current of atmospheric air; such as those that develop on the lee side of steep cliffs.
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