Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. barometer

from the GNU version of the Collaborative International Dictionary of English

  • n. Any instrument showing the changes in the weight of the atmosphere; also, less appropriately, any instrument that indicates or foreshadows changes of the weather, as a deep vial of liquid holding in suspension some substance which rises and falls with atmospheric changes.

from The Century Dictionary and Cyclopedia

  • n. An instrument used to indicate changes in the pressure of the atmosphere without measuring its absolute weight. See weather-glass and storm-glass.
  • n. A piece of physical apparatus used to demonstrate the upward pressure of the air.

Etymologies

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