Source : Webster's Revised Unabridged Dictionary (1913)

Sloping \Slop"ing\, a.
   Inclining or inclined from the plane of the horizon, or from
   a horizontal or other right line; oblique; declivous;
   slanting. -- {Slop"ing*ly}, adv.

         The sloping land recedes into the clouds. --Cowper.

Source : WordNet®

slopingly
     adv : with a slant [syn: {slantingly}]