- a device for measuring atmospheric pressure, often specially calibrated for use as an altimeter, consisting of a box or chamber partially exhausted of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air.
Compare mercury barometer.
(http://dictionary.reference.com/browse/aneroid+barometer)
"Stevedores hauled the Jeannette's weapons on deck... Next came the navigational and scientific equipment: chronometers, hydrometers, ozonometers, magnetometers, aneroid barometers, transits, sextants, pendulums, zenith telescopes, microscopes, test tubes, Bunsen burners, theodolites."
- Hampton Sides, In the Kingdom of Ice: The Grand and Terrible Polar Voyage of the USS Jeannette
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