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Mach

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mach

  [mahk]
Use Mach in a Sentence
–noun
a number indicating the ratio of the speed of an object to the speed of sound in the medium through which the object is moving. Abbreviation: M
Also, Mach.
Also called mach number, Mach number.

Origin:
after E. Mach
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Mach

  [mahk; Ger. mahkh]
–noun
Ernst  [ernst] , 1838–1916, Austrian physicist, psychologist, and philosopher.

mach.

 
1. machine.
2. machinery.
3. machinist.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Mach also mach   (mäk)   
n.  Mach number.
Mach   (mäk, mäKH)   
Austrian physicist and philosopher who played a central role in the development of logical positivism. His works include the influential Science of Mechanics (1883).
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

Mach 
measure of speed relative to the speed of sound (technically Mach number), 1937, named in honor of Austrian physicist Ernst Mach (1838-1916).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: Mach
Pronunciation: 'mäk
Function: noun
: a usually high speed expressed by a Mach number Mach 2>
Mach /'mäk,/ Ernst (1838–1916), Austrian physicist and philosopher. Mach established the basic principles of scientific positivism. In the 1870s hemade classic studies on the perception of bodily rotation. Mach was also a pioneer in the study of supersonic projectiles and jets. In 1887 he described in a paper on projectiles in flight the anglebetween the axis of the projectile and the envelope of the waves produced. This angle forms the basis for the Mach number.
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Computing Dictionary

Mach
An operating system kernel under development at Carnegie-Mellon University to support distributed and parallel computation. Mach is designed to support computing environments consisting of networks of uniprocessors and multiprocessors. Mach is the kernel of the OSF/1.

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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