Aneroid barometer

Aneroid barometer
Barometer Ba*rom"e*ter, n. [Gr. ba`ros 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. [1913 Webster]

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. [1913 Webster]

{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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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Look at other dictionaries:

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  • aneroid barometer — n a barometer in which the action of atmospheric pressure in bending a metallic surface is made to move a pointer …   Medical dictionary

  • aneroid barometer — n. a barometer with a needle connected by mechanical linkages and springs to a thin, hollow metal disk in which a partial vacuum is maintained: a change in atmospheric pressure changes the shape of the disk, thus moving the needle …   English World dictionary

  • aneroid barometer — noun a barometer that measures pressure without using fluids • Syn: ↑aneroid • Derivationally related forms: ↑aneroid (for: ↑aneroid) • Hypernyms: ↑barometer …   Useful english dictionary

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  • aneroid barometer — barometer that measures atmospheric pressure by means of a thin metal disk which covers a partial vacuum …   English contemporary dictionary

  • Aneroid-Barometer — Jugendstil Wandbarometer Ein Barometer ist ein Messgerät zur Bestimmung des Luftdrucks und findet in einer Vielfalt unterschiedlichster Formen und Typen meist in der Meteorologie Anwendung. Es handelt sich folglich um eine spezielle Gruppe von… …   Deutsch Wikipedia

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