Source : Webster's Revised Unabridged Dictionary (1913)

Pictograph \Pic"to*graph\, n. [See {Picture}, and {-graph}.]
   A picture or hieroglyph representing and expressing an idea.
   -- {Pic`to*graph"ic}, a.

Source : WordNet®

pictographic
     adj : consisting of or characterized by the use of pictographs; "a
           pictographic script"; "pictographic stage in the
           development of writing"