Main Entry: al·tim·e·ter

Pronunciation: \al-ˈti-mə-tər, ˈal-tə-ˌmē-tər\

Function: noun

Etymology: Latin altus + English -meter

Date: circa 1828

: an instrument for measuring altitude; especially : an aneroid barometer designed to register changes in atmospheric pressure accompanying changes in altitude

— al·tim·e·try \al-ˈti-mə-trē\ noun