Source : Webster's Revised Unabridged Dictionary (1913)

Pyroelectric \Pyr`o*e*lec"tric\, a. [Pyro- + electric.]
   (Physics)
   Pertaining to, or dependent on, pyroelectricity; receiving
   electric polarity when heated.

Pyroelectric \Pyr`o*e*lec"tric\, n. (Physics)
   A substance which becomes electrically polar when heated,
   exhibiting opposite charges of statical electricity at two
   separate parts, especially the two extremities.

Source : WordNet®

pyroelectric
     adj : relating to or exhibiting pyroelectricity [syn: {pyroelectrical}]