English abbreviation dictionary - mach
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1.
Mach is used as a unit of measurement in stating the speed of a moving object in relation to the speed of sound. For example, if an aircraft is travelling at Mach 1, it is travelling at exactly the speed of sound. (TECHNICAL) N-UNCOUNT: N n/num ...Collins COBUILD Advanced Learner's English Dictionary
2.
abbreviation ~ine; ~inery; ~inist MACH I. noun Etymology: ~ number Date: 1946 a usually high speed expressed by a ~ number an airplane flying at ~ 2 II. biographical name Ernst 1838-1916 Austrian physicist & philosopher ...Merriam-Webster Collegiate Dictionary
3.
n. (in full Mach number) the ratio of the speed of a body to the speed of sound in the surrounding medium. Phrases and idioms Mach one (or two etc.) the speed (or twice the speed) of sound. Etymology: E. Mach, Austrian physicist d. 1916 ...Толковый словарь английского языка Oxford English Reference
4.
1. ав. мах, число Маха, число М. Mach 2,5 aircraft —- самолет, развивающий скорость 2,5 маха mach 1. сокр. от machine, machinery и machinist ...Новый большой англо-русский словарь
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