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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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Science Dictionary
Mach   (mäk, mäKH)  Pronunciation Key 
Austrian physicist and philosopher who experimented with supersonic projectiles and the flow of gases, obtaining early photographs of shock waves and gas jets. His work laid an important foundation for later developments in the science of projectiles and aeronautical design, and the Mach number and Mach bands were named for him.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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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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