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hiccup

(Encyclopedia)hiccup or hiccough, involuntary spasmodic contraction of the diaphragm followed by a sharp intake of air, which is abruptly stopped by a sudden, involuntary closing of the glottis (opening between the...

Kesselring, Albert

(Encyclopedia)Kesselring, Albert älˈbĕrt kĕsˈəlrĭng [key], 1885–1960, German field marshal. An artillery staff officer in World War I, he later joined the air force and rapidly rose in rank during the Hitl...

White Sands

(Encyclopedia)White Sands, uninhabited desert area, S central N.Mex. It is a center for U.S. military-weapons research and testing. On July 16, 1945, the first atomic bomb was exploded at Holloman Air Force Base (f...

Boyd, Alan Stephenson

(Encyclopedia)Boyd, Alan Stephenson, 1922–2020, U.S. government official, first secretary of transportation (1967–69), b. Jacksonville, Fla. After serving in the Army Air Forces in World War II, he graduated fr...

instrument flight regulations

(Encyclopedia)instrument flight regulations: see air navigation. ...

ground speed indicator

(Encyclopedia)ground speed indicator: see air navigation. ...

visual flight regulations

(Encyclopedia)visual flight regulations: see air navigation. ...

ground-effect machine

(Encyclopedia)ground-effect machine: see air-cushion vehicle. ...

Strategic Command

(Encyclopedia)Strategic Command: see under Strategic Air Command. ...

hydrogen bomb

(Encyclopedia)hydrogen bomb or H-bomb, weapon deriving a large portion of its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb, uranium or plutonium is split into lighter elements that togethe...