pi·e·zo·e·lec·tric·i·ty 
(pē-ā′zō-ĭ-lĕk-trĭsĭ-tē, pī-ē′-)
(pē-ā′zō-ĭ-lĕk-trĭsĭ-tē, pī-ē′-)n.
The generation of electricity or of electric polarity in dielectric crystals subjected to mechanical stress, or the generation of stress in such crystals subjected to an applied voltage.
pi·e′zo·e·lectric, pi·e′zo·e·lectri·cal adj.
pi·e′zo·e·lectri·cal·ly adv.