The Collaborative International Dictionary of English v.0.48:

Dapple \Dap"ple\, v. t. [imp. & p. p. Dappled; p. pr. & vb. n.
   Dappling.]
   To variegate with spots; to spot.
   [1913 Webster]

         The gentle day, . . .
         Dapples the drowsy east with spots of gray. --Shak.
   [1913 Webster]

         The dappled pink and blushing rose.      --Prior.
   [1913 Webster]