From Longman Dictionary of Contemporary Englishwhite horsesˌwhite ˈhorses noun [plural] British English DNwaves in the sea or on a lake that are white at the top SYN whitecaps American English
Examples from the Corpus
white horses• All those carved white horses on chalk hillsides.• Small waves becoming longer, fairly frequent white horses.• Moderate waves, taking more pronounced long form; many white horses are formed.• The carousel, its rows of white horses resplendent with red leather saddles and black-painted bridles, was thankfully almost empty.• Aurangzeb and his other brothers, on white horses, are relegated to the picture's margin.• Consider Cinderella with her glass coach and prancing white horses.• The tumbled surface of the sea looked blue-green, with white horses as far as the eye could see.• El Cid and his wonderful white horses, said the poster. 