Main Entry: to·nom·e·ter

Pronunciation: \tō-ˈnäm-ət-ər\

Function: noun

: an instrument for measuring tension or pressure and especially intraocular pressure

—to·no·met·ric \ˈtō-nə-ˈme-trik, ˌtän-ə-\ adjective

—to·nom·e·try \tō-ˈnäm-ə-trē\ noun, plural to·nom·e·tries