Source : Webster's Revised Unabridged Dictionary (1913)

Electre \E*lec"tre\, Electer \E*lec"ter\, n. [L. electrum: cf.
   F. ['e]lectre mixture of gold and silver. See {Electrum}.]
   1. Amber. See {Electrum}. [Obs.]

   2. A metallic substance compounded of gold and silver; an
      alloy. [Obs.] --Wyclif.