Definitions for hypsometer
an altimeter that uses the boiling point of water to determine land elevation
An instrument that measures altitude indirectly by measuring the boiling point of water (which varies with atmospheric pressure).
an instrument for measuring heights by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition