a. [ Pyro- + electric. ] (Physics) Pertaining to, or dependent on, pyroelectricity; receiving electric polarity when heated. [ 1913 Webster ]
n. (Physics) A substance which becomes electrically polar when heated, exhibiting opposite charges of statical electricity at two separate parts, especially the two extremities. [ 1913 Webster ]
n. (Physics) Electricity developed by means of heat; the science which treats of electricity thus developed. [ 1913 Webster ]