Source : Webster's Revised Unabridged Dictionary (1913)

Pictorial \Pic*to"ri*al\, a. [L. pictorius, fr. pictor a
   painter, fr. pingere to paint. See {Paint}.]
   Of or pertaining to pictures; illustrated by pictures;
   forming pictures; representing with the clearness of a
   picture; as, a pictorial dictionary; a pictorial imagination.
   ``Pictorial rhetoric.'' --Ruskin. -- {Pic*to"ri*al*ly}, adv.

Source : WordNet®

pictorially
     adv : in a pictorial manner; "depth is established pictorially"