electrification or electrical polarity produced in certain crystals by temperature changes.
Origin of pyroelectricity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012