lug·sail /ˈlʌgˌsel, səl/
後緣長的四角縱帆
Lug·sail n. Naut. A square sail bent upon a yard that hangs obliquely to the mast and is raised or lowered with the sail.
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lugsail
n : a sail with four corners that is hoisted from a yard that is
oblique to the mast [syn: lug]