MACH


Meaning of MACH in English

[ mα:k , mak ]

(also ~ number )

■ noun the ratio of the speed of a body to the speed of sound in the surrounding medium, used with a numeral (as ~ 1 , ~ 2 , etc.) to indicate the speed of sound, twice the speed of sound, etc.

Origin

1930s: named after the Austrian physicist Ernst ~ .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.