The Collaborative International Dictionary of English v.0.48:

Dapple \Dap"ple\, n. [Cf. Icel. depill a spot, a dot, a dog with
   spots over the eyes, dapi a pool, and E. dimple.]
   One of the spots on a dappled animal.
   [1913 Webster]

         He has . . . as many eyes on his body as my gray mare
         hath dapples.                            --Sir P.
                                                  Sidney.
   Dapple

The Collaborative International Dictionary of English v.0.48:

Dapple \Dap"ple\, Dappled \Dap"pled\, a.
   Marked with spots of different shades of color; spotted;
   variegated; as, a dapple horse.
   [1913 Webster]

         Some dapple mists still floated along the peaks. --Sir
                                                  W. Scott.
   [1913 Webster]

   Note: The word is used in composition to denote that some
         color is variegated or marked with spots; as,
         dapple-bay; dapple-gray.
         [1913 Webster]

               His steed was all dapple-gray.     --Chaucer.
         [1913 Webster]

               O, swiftly can speed my dapple-gray steed. --Sir
                                                  W. Scott.
         [1913 Webster]

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]

WordNet (r) 3.0 (2006):

dapple
    n 1: a small contrasting part of something; "a bald spot"; "a
         leopard's spots"; "a patch of clouds"; "patches of thin
         ice"; "a fleck of red" [syn: spot, speckle, dapple,
         patch, fleck, maculation]
    v 1: colour with streaks or blotches of different shades [syn:
         mottle, dapple, cloud]