Pronunciation: (thûr"mō-bu-rom'i-tur), [key]
1. Also called hypsometer. an instrument for measuring atmospheric pressure, and sometimes altitude, from its effect upon the boiling point of a liquid.
2. a form of barometer so constructed that it may also be used as a thermometer.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.