Source : Webster's Revised Unabridged Dictionary (1913)

Powdery \Pow"der*y\, a.
   1. Easily crumbling to pieces; friable; loose; as, a powdery
      spar.

   2. Sprinkled or covered with powder; dusty; as, the powdery
      bloom on plums.

   3. Resembling powder; consisting of powder. ``The powdery
      snow.'' --Wordsworth.

Source : WordNet®

powdery
     adj 1: consisting of fine particles; "powdered cellulose"; "powdery
            snow"; "pulverized sugar is prepared from granulated
            sugar by grinding" [syn: {powdered}, {pulverized}, {pulverised},
             {small-grained}, {fine-grained}]
     2: as if dulled in color with a sprinkling of powder; "a
        powdery blue"