Source : Webster's Revised Unabridged Dictionary (1913)

Papyrograph \Pa*pyr"o*graph\, n. [Papyrus + -graph.]
   An apparatus for multiplying writings, drawings, etc., in
   which a paper stencil, formed by writing or drawing with
   corrosive ink, is used. The word is also used of other means
   of multiplying copies of writings, drawings, etc. See
   {Copygraph}, {Hectograph}, {Manifold}.