Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An aircraft instrument that indicates speed in Mach numbers.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument that measures the speed of an aircraft relative to that of sound and displays it in Mach numbers

from the GNU version of the Collaborative International Dictionary of English

  • n. an instrument for measuring the speed of an aircraft relative to the speed of sound.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. speedometer for measuring the speed of an aircraft relative to the speed of sound

Etymologies

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Examples

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