Mach number

noun
\ ˈmäk- \

Definition of Mach number 

: a number representing the ratio of the speed of a body (such as an aircraft) to the speed of sound in a surrounding medium (such as air)

First Known Use of Mach number

1937, in the meaning defined above

History and Etymology for Mach number

Ernst Mach †1916 Austrian physicist

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Dictionary Entries near Mach number

Machism

machismo

Machmeter

Mach number

macho

machopolyp

machree

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The first known use of Mach number was in 1937

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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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