(*) The speed at which sound travels in a given medium under specified conditions. The speed of sound at sea level in the International Standard Atmosphere is 1108 ft/second, 658 knots, 1215 km/hour. See also hypersonic; sonic; subsonic; supersonic; transonic.
SPEED OF SOUND
Meaning of SPEED OF SOUND in English
DOD English dictionary of military terms. Английский словарь военных терминов DOD. 2012