whitecap Meaning, Definition & Usage
- 
       noun a wave that is blown by the wind so its crest is broken and appears white
       
       
 white horse.
 
WordNet
White"cap` noun
Definitions
-  (Zoöl.) (a) The European redstart; -- so called from its white forehead. (b) The whitethroat; -- so called from its gray head. (c) The European tree sparrow. 
-  A wave whose crest breaks into white foam, as when the wind is freshening.