First Known Use: 1937
Dictionary
Mach number
noun \ˈmäk-\
Definition of MACH NUMBER
: a number representing the ratio of the speed of a body (as an aircraft) to the speed of sound in a surrounding medium (as air)
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Origin of MACH NUMBER
Ernst Mach †1916 Austrian physicist
Medical Dictionary
Mach number
noun \ˈmäk-\
Medical Definition of MACH NUMBER
: a number representing the ratio of the speed of a body to the speed of sound in a surrounding medium (as air) <a Mach number of 2 indicates a speed that is twice that of sound>
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