Source : Webster's Revised Unabridged Dictionary (1913)

Electrotype \E*lec"tro*type\, n. [Electro- + -type.]
   A facsimile plate made by electrotypy for use in printing;
   also, an impression or print from such plate. Also used
   adjectively.

   Note: The face of an electrotype consists of a shell of
         copper, silver, or the like, produced by the action of
         an electrical current upon a plate of metal and a wax
         mold suspended in an acid bath and connected with
         opposite poles of the battery. It is backed up with a
         solid filling of type metal.

Electrotype \E*lec"tro*type\, v. t. [imp. & p. p.
   {Electrotyped}; p. pr. & vb. n. {Electrotyping}.]
   To make facsimile plates of by the electrotype process; as,
   to electrotype a page of type, a book, etc. See
   {Electrotype}, n.