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Noun: Mach  maak or mak
  1. The ratio of the speed of a moving body to the speed of sound
    - Mach number
     
  2. Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916)
    - Ernst Mach

Sounds like: mac, Mach

Derived forms: Maches

Type of: philosopher, physicist, ratio

Encyclopedia: Mach, Daniel