The Collaborative International Dictionary of English v.0.48:

Anelectric \An`e*lec"tric\, a. [Gr. 'an priv. + E. electric.]
   (Physics)
   Not becoming electrified by friction; -- opposed to
   idioelectric. -- n. A substance incapable of being
   electrified by friction. --Faraday.
   [1913 Webster]