from the GNU version of the Collaborative International Dictionary of English
- n. An aneroid barometer having a second scale that gives the approximate elevation above sea level of the place where the observation is made.
from The Century Dictionary and Cyclopedia
- n. A form of aneroid barometer provided with two scales, one giving barometric pressures, the other the approximate elevation above the sea-level where the observation is made; a mountain-barometer.
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