The Collaborative International Dictionary
Whitecapper
Whitecap \White"cap`\, n.
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(Zo["o]l.)
The European redstart; -- so called from its white forehead.
The whitethroat; -- so called from its gray head.
The European tree sparrow.
A wave whose crest breaks into white foam, as when the wind is freshening.
A member of a self-appointed vigilance committee attempting by lynch-law methods to drive away or coerce persons obnoxious to it. Some early ones wore white hoods or masks. [U. S.] -- White"cap`, v. -- White"cap`per, n.