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air bladder

(Encyclopedia)air bladder, in fish: see swim bladder. ...

atomic mass unit

(Encyclopedia)atomic mass unit or amu, in chemistry and physics, unit defined as exactly 1⁄12 the mass of an atom of carbon-12, the isotope of carbon with six protons and six neutrons in its nucleus. One amu is e...

air traffic control

(Encyclopedia)air traffic control, the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional control centers that r...

air-cushion vehicle

(Encyclopedia)CE5 Air-cushion vehicle: In vehicles modified with a trunk or skirt (A), the rate of leakage is reduced and less power is needed to maintain the cushion. Vehicles designed to travel over deep water...

Strategic Air Command

(Encyclopedia)Strategic Air Command (SAC), former command of the U.S. air force (see Air Force, United States Department of the) charged with organizing, training, equipping, administering, and preparing strategic ...

Lackland Air Force Base

(Encyclopedia)Lackland Air Force Base lăkˈlənd [key], U.S. military installation, c.6,835 acres (2,766 hectares), S Tex., W of San Antonio; est. 1941, amalgated 2010 with Fort Sam Houston and Randolph Air Force ...

Langley Air Force Base

(Encyclopedia)Langley Air Force Base, U.S. military installation, 3,195 acres (1,293 hectares), SE Va., N of Hampton; est. 1917 and named for aviation pioneer Samuel P. Langley, amalgamated 2010 with Fort Eustis in...

air, law of the

(Encyclopedia)air, law of the, in the broadest sense, all law connected with the use of the air, including radio and satellite transmissions; more commonly, it refers to laws concerning civil aviation. The developm...

Edwards Air Force Base

(Encyclopedia)Edwards Air Force Base, U.S. military installation, 301,000 acres (121,805 hectares), S Calif., NE of Lancaster; est. 1933. It is one of the largest air force bases in the United States and has the wo...

Malmstrom Air Force Base

(Encyclopedia)Malmstrom Air Force Base mälmˈstrəm, mălmˈ– [key], U.S. military installation, 3,573 acres (1,446 hectares), W central Mont., E of Great Falls; est. 1942. During World War II, it was the takeof...