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Generation of electric charge on a crystal by change of temperature.
(General Physics) the development of opposite charges at the ends of the axis of certain hemihedral crystals, such as tourmaline, as a result of a change in temperature
py•ro•e•lec•tric•i•ty(ˌpaɪ roʊ ɪ lɛkˈtrɪs ɪ ti, -ˌi lɛk-)
electrification or electrical polarity produced in certain crystals by temperature changes.