The Collaborative International Dictionary of English v.0.48:

lithographic \lith`o*graph"ic\, lithographical
\lith`o*graph"ic*al\, a. [Cf. F. lithographique.]
   Of or pertaining to lithography; made by lithography; as, the
   lithographic art; a lithographic picture.
   [1913 Webster]

   Lithographic limestone (Min.), a compact, fine-grained
      limestone, obtained largely from the Lias and O["o]lite,
      esp. of Bavaria, and extensively used in lithography. --
      Lith`o*graph"ic*al*ly, adv.
      [1913 Webster]