Source : Webster's Revised Unabridged Dictionary (1913)

Topiarian \Top`i*a"ri*an\, a. [See {Toplary}.]
   Of or pertaining to the ornamental cutting and trimming of
   trees, hedges, etc.; practicing ornamental gardening. [R.]
   ``The topiarian artist.'' --Sir W. Scott.

         All the pedantries of the topiarian art. --C. Kingsley.