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n. An instrument for measuring atmospheric pressure, used especially in weather forecasting.

n. Something that registers or responds to fluctuations; an indicator: Opinion polls serve as a barometer of the public mood.

n. An instrument for measuring atmospheric pressure.

n. Anything used as a gauge or indicator.

n. An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent.

n. An instrument for measuring the weight or pressure of the atmosphere, invented by Evangelista Torricelli, an Italian mathematician and physicist, in 1643.

n. an instrument that measures atmospheric pressure

"On Nov. 17, 1884, Bell's lab recorded the word "barometer" several times on a glass disc with a beam of light."

measuring device    measuring instrument    measuring system   

mascart's gravity barometer    howson's barometer    capillary depression of the barometer    self-registering barometer    true height of the barometer    pumping of the barometer    dines's minimum barometer    aneroid barometer    marine barometer    blakesley portable barometer   

weatherglass    aneroid barometer    mercury barometer    barograph    aneroid   

photometer    tensiometer   

thermometer    altimeter    gauge    sextant    chronometer    compass    spyglass    anemometer    theodolite    timekeeper