What does "dappled" mean?

Dappled: Marked with spots of different shades of color; spotted; variegated; as, a dapple horse. Some dapple mists still floated along the peaks. Sir W. Scott. Note: The word is used in composition to denote that some color is variegated or marked with spots; as, dapple-bay; dapple-gray. His steed was all dapple-gray. Chaucer. O, swiftly can speed my dapple-gray steed. Sir W. Scott.

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