barometer

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barometer

[bərom′ətər]
Etymology: Gk, baros + metron, measure
an instrument for measuring atmospheric pressure, commonly consisting of a slender tube filled with mercury, sealed at one end, and inverted into a reservoir of mercury. At sea level the normal height of mercury in the tube is 760 mm. At higher elevations the mercury column height (barometric pressure) is less. Fluctuations in barometric pressure may precede major changes in weather, making a barometer useful in meteorological forecasting. barometric, adj.

barometer

Medspeak
A poetic alternative to prognosticator
 
Meteorology
An instrument used to measure atmospheric pressure.

ba·rom·e·ter

(băr-om'ĕ-tĕr)
Instrument used to measure atmospheric pressure.
[G. baros, weight, + metron, measure]
References in periodicals archive ?
Although her new life as a Navy wife is likely to be exhilarating and liberating in many ways, she will hardly be able to take a piano-an expensive, large, and barometrically temperamental instrument--with her when she accompanies Wentworth aboard ship.
I learned to forecast rain in this way from my grandmother, almost twelve hours ahead of time on the plains--a forecasting that remains with me still, although here in Ohio the barometrically imposed flip of leaves won't always signify rain with quite the certainty I came to expect in Kansas.
While in the coast mode, GPWS calculates a best estimate of the aircraft's current height above the ground, using barometrically damped inertial altitude and the terrain elevation measured when the radalt failed.