Whitecap (noun)

A white foam of breaking waves on the sea or ocean.

Origin:

Unknown.

Examples:

1. The whitecaps were visible from a distance, marking the location of the rocky reef.
2. The whitecaps were a warning of the rough sea ahead.
3. The boat was tossed about by the whitecaps and the wind.
4. The shore was dotted with whitecaps as the waves broke against the rocks.
5. The sailors tried to keep the boat pointed into the wind to avoid the worst of the whitecaps.