See Also: Mach(dictionary)
Mach(dictionary)
Mach, Ernst(encyclopedia)
Mach's principle(encyclopedia)
Meridian Mach(finance)
COSMOS MACH(finance)
Mach's band(medicine)
Mach number(medicine)
Mach line(medicine)
Mach effect(medicine)

Mach (iou)



Mach noun. [mɑ:k, mak, ma:x] E20.
[Ernst Mach (1838-1916), Austrian physicist and philosopher.]
Mach's principle, the hypothesis that a body's inertial mass results from its interaction with the rest of the matter in the universe. E20.
Mach number, the ratio of the speed of a body to the speed of sound in the surrounding medium; Mach one, Mach two, or Mach 1, Mach 2, etc., a speed corresponding to a Mach number of one, two, etc. M20.
Mach bands, Mach's bands, illusory bright or dark bands perceived where the spatial rate of variation of surface brightness abruptly increases or decreases (as at the edge of an indistinct shadow). M20.
Comb.: Machmeter an air-speed indicator that reads directly in Mach numbers.
Machian adjective & noun (a) adjective of, pertaining to, or characteristic of Ernst Mach or his philosophical ideas, in which the principles of mechanics were based on an extreme sensationalist empiricism; (b) noun a follower or adherent of Mach: E20.
Machism noun the theories of Ernst Mach, esp. his concept of empiro-criticism E20.