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Symplectic :: Sympiesometer (n.) A sensitive kind of barometer, in which the pressure of the atmosphere, acting upon a liquid, as oil, in the lower portion of the instrument, compresses an elastic gas in the upper part..

Isobar :: 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..

#NAME? :: -meter () A suffix denoting that by which anything is measured; as, barometer, chronometer, dynamometer..

Barometrically :: Barometrically (adv.) By means of a barometer, or according to barometric observations..

Barometrograph :: Barometrograph (n.) A form of barometer so constructed as to inscribe of itself upon paper a record of the variations of atmospheric pressure.

Glass :: Glass (v. t.) A weatherglass; a barometer.

Barometer :: 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..

Weatherglass :: 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..

Holosteric :: 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..

Aneroid :: Aneroid (a.) Containing no liquid; -- said of a kind of barometer.

Vernier :: Vernier (n.) A short scale made to slide along the divisions of a graduated instrument, as the limb of a sextant, or the scale of a barometer, for indicating parts of divisions. It is so graduated that a certain convenient number of its divisions are just equal to a certain number, either one less or one more, of the divisions of the instrument, so that parts of a division are determined by observing what line on the vernier coincides with a line on the instrument..

Meteorometer :: Meteorometer (n.) An apparatus which transmits automatically to a central station atmospheric changes as marked by the anemometer, barometer, thermometer, etc..

Fall :: Fall (v. t.) To Descend, either suddenly or gradually; particularly, to descend by the force of gravity; to drop; to sink; as, the apple falls; the tide falls; the mercury falls in the barometer..

Barometrical :: Barometrical (a.) Pertaining to the barometer; made or indicated by a barometer; as, barometric changes; barometrical observations..

Mercury :: Mercury (n.) A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by his symbol, /..

Reading :: Reading (n.) An observation read from the scale of a graduated instrument; as, the reading of a barometer..

Torricellian :: Torricellian (a.) Of or pertaining to Torricelli, an Italian philosopher and mathematician, who, in 1643, discovered that the rise of a liquid in a tube, as in the barometer, is due to atmospheric pressure. See Barometer..

Atmo :: 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 0¡ Centigrade, at the level of the sea, and in the latitude of Paris..

Thermobarometer :: Thermobarometer (n.) An instrument for determining altitudes by the boiling point of water.

Hydrobarometer :: Hydrobarometer (n.) An instrument for determining the depth of the sea water by its pressure.

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