Leeboard

1. n. A board, or frame of planks, lowered over the side of a vessel to lessen her leeway when closehauled, by giving her greater draught.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.