an'eroid barom'eter

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. Cf. mercury barometer.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

aneroid barographaneroid capsule
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