piezometer

pi·ezom·e·ter

noun
\ˌpē-ə-ˈzäm-ət-ər, pē-ˌāt-ˈsäm-\

Definition of PIEZOMETER

: an instrument for measuring pressure or compressibility; especially : one for measuring the change of pressure of a material subjected to hydrostatic pressure

—pi·ezo·met·ric \pē-ˌā-zə-ˈme-trik, pē-ˌāt-sə-\ adjective

—pi·ezom·e·try \ˌpē-ə-ˈzäm-ə-trē, pē-ˌāt-ˈsäm-\ noun, plural pi·ezom·e·tries