The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]