"of two different colors," 1580s, formed from pie (n.2) "magpie" + bald in its older sense of "spotted, white;" in reference to the black-and-white plumage of the magpie. Hence, "of mixed character, mongrel." Technically only of black-and-white colorings.
实用例句
1. It is a piebald pony.
这是一匹黑白斑小型马。
来自辞典例句
2. Note A perfect piebald is preferable a muddy brindle or defective solid color.