Source : Webster's Revised Unabridged Dictionary (1913)

Stipple \Stip"ple\, v. t. [imp. & p. p. {Stippled}; p. pr. & vb.
   n. {Stippling}.] [D. stippelen to make points, to spot, dot,
   from stippel, dim. of stip a dot, spot.]
   1. To engrave by means of dots, in distinction from engraving
      in lines.

            The interlaying of small pieces can not altogether
            avoid a broken, stippled, spotty effect. --Milman.

   2. To paint, as in water colors, by small, short touches
      which together produce an even or softly graded surface.

Source : WordNet®

stippled
     adj : having a pattern of dots [syn: {dotted}, {flecked}, {specked},
            {speckled}]