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Barometer - Dictionary Definition and Overview |
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Barometer : (noun)
1: an instrument that measures atmospheric pressure
Based on WordNet 2.0
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Barometer : \Ba*rom"e*ter\, n. [Gr. ? weight _ -meter: cf. F.
barom[`e]tre.]
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.
Note: The barometer was invented by Torricelli at Florence
about 1643. It is made in its simplest form by filling
a graduated glass tube about 34 inches long with
mercury and inverting it in a cup containing mercury.
The column of mercury in the tube descends until
balanced by the weight of the atmosphere, and its rise
or fall under varying conditions is a measure of the
change in the atmospheric pressure. At the sea level
its ordinary height is about 30 inches (760
millimeters). See Sympiesometer. --Nichol.
Aneroid barometer. See Aneroid barometer, under
Aneroid.
Marine barometer, a barometer with tube contracted at
bottom to prevent rapid oscillations of the mercury, and
suspended in gimbals from an arm or support on shipboard.
Mountain barometer, a portable mercurial barometer with
tripod support, and long scale, for measuring heights.
Siphon barometer, a barometer having a tube bent like a
hook with the longer leg closed at the top. The height of
the mercury in the longer leg shows the pressure of the
atmosphere.
Wheel barometer, a barometer with recurved tube, and a
float, from which a cord passes over a pulley and moves an
index.
Based on Webster's Revised Unabridged Dictionary
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Barometer : A device for measuring pressure.
Based on the Online Chemistry Dictionary [Chemistry]:
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Barometer : A device for measuring pressure.
Based on the Online Chemistry Dictionary [Chemistry]:
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Example Usage of Barometer |
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simmtek: Wind 6.1 mph NW. Barometer 1003.9 hPa, Rising slowly. Temperature 0.4 °C. Rain today 0.0 mm. Humidity 83% |
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espoo_weather: At noon: Cloudy -21°C, calm, Barometer 1024 mb (falling), humidity 88% |
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desotowiweather: 04:00 AM:Temp: 12.4F - Wind: 0.0 m/s (SSE) -Barometer: 30.055 hPa - Humidity: 86% - Rain: 0.00 #fb |
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