hypsometer
/hɪpˈsɑmɪtər/
noun
- An instrument used to measure height or altitude, especially by determining the boiling point of water at different atmospheric pressures.
- Scientists calibrated the hypsometer before the field expedition.
- A hypsometer can give a rough altitude reading based on water's boiling temperature.
- The hiker used a hypsometer to estimate the mountain's elevation.
Synonyms