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barometer
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- Barometer - 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.
- Barometrograph - n. - A form of barometer so constructed as to inscribe of itself upon paper a record of the variations of atmospheric pressure.
- Weatherglass - n. - An instrument to indicate the state of the atmosphere, especially changes of atmospheric pressure, and hence changes of weather, as a barometer or baroscope.
- Water barometer - - A barometer in which the changes of atmospheric pressure are indicated by the motion of a column of water instead of mercury. It requires a column of water about thirty-three feet in height.
- Atmo - n. - The standard atmospheric pressure used in certain physical measurements calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0ยก Centigrade, at the level of the sea, and in the latitude of Paris.
- Isobar - n. - A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time, or for a certain period (mean height), as for a year; an isopiestic line.
- Holosteric - a. - Wholly solid; -- said of a barometer constructed of solid materials to show the variations of atmospheric pressure without the use of liquids, as the aneroid.