leeboard

1. (nautical, countable) A board, or frame of planks, lowered over the side of a sailboat to lessen its leeway.Examples: "[…] on the port side a sofa bed was put up and fitted with a leeboard. On the starboard side a short seat with a folding cot above, which folded […]"; "Forward of the mizzenmast was an iron box in which the mainsheets worked, and to port and starboard were the leeboard winches, hand-worked."; "I lowered the starboard leeboard. I sent Kester up forward with the binoculars. 'Any buoy,' I told him, 'just yell and point.'"countable

2. (uncommon) Port, larboard (the side of a ship opposite starboard).Examples: "Even in complete reversals from starboard to leeboard in a high sea, no shocks, either electrical or mechanical, could be observed."; "[…] because the leeboard side could be easily unrigged to avoid damaging the rigging, while the starboard side would be required to safely navigate the vessel."; "Riek's berth was on the starboard side with two women, and mine was on the leeboard side with two men. One of the two men was a baron, […]"countableuncommonuncountable