piezometer

 
Pronunciation: /ˌpʌɪɪˈzɒmɪtə/

noun

  • an instrument for measuring the pressure of a liquid or gas, or something related to pressure (such as the compressibility of liquid). Piezometers are often placed in boreholes to monitor the pressure or depth of groundwater.

Origin:

early 19th century: from Greek piezein 'press, squeeze' + -meter