hypsometer
noun
- a device for determining height above sea level by measuring atmospheric pressure as indicated by the boiling point of water
- any of several instruments for measuring heights of trees by triangulation
See hypsometer in American Heritage Dictionary 4
(hĭp-sŏmˈĭ-tər)
noun An instrument using the atmospheric pressure as measured by the change in the boiling point of water to determine land elevations.
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