thermobarometer

[ thur-moh-buh-rom-i-ter ]
/ ˌθɜr moʊ bəˈrɒm ɪ tər /

noun

Also called hypsometer. an instrument for measuring atmospheric pressure, and sometimes altitude, from its effect upon the boiling point of a liquid.
a form of barometer so constructed that it may also be used as a thermometer.

Origin of thermobarometer

First recorded in 1860–65; thermo- + barometer
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for thermobarometer

thermobarometer

/ (ˌθɜːməʊbəˈrɒmɪtə) /

noun

an apparatus that provides an accurate measurement of pressure by observation of the change in the boiling point of a fluid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012