Synonyms of 'piebald'
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brown or grey streaked or patched with a darker colour
a brindled cat seated on a mat
You use dappled to describe something that has dark or light patches on it, or that is made up of patches of light and shade.
He stood in the dappled sunlight of the forest.
Thesaurus for piebald from the Collins English Thesaurus
A piebald animal has patches of black and white on it.