Centerboard meaning

sĕntər-bôrd
A movable keel in a sailboat that can be pivoted upward to reduce the boat's draft in shallow water.
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A movable board or metal plate that, when lowered through a slot in the floor of a shallow-draft sailboat, functions like a keel to reduce leeward drift or increase stability, esp. one that moves on a pivot.
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Alternative spelling of centreboard.
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