Definition of: piezometer

(pī′ə·zom′ə·tər) noun
1. An instrument for determining pressure; specifically, an apparatus for measuring the compressibility of liquids.
2. An attachment for a sounding line that denotes by the compression of air in a tube the depth of water to which the appliance descends.
3. A similar instrument used in ascertaining the sensitiveness of the skin to pressure.
—pi′e·zo·met′ric (-zō·met′·rik) or ·ri·cal adjective
—pi′e·zom′e·try noun