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

  • n. A device for measuring pressures below atmospheric pressure.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument that is used to measure very low pressures of gases

from the GNU version of the Collaborative International Dictionary of English

  • n. a species of barometer for determining the relative elasticities of the vapor in the condenser of a steam engine and the air.

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

  • n. a gauge for indicating negative atmospheric pressure


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