Waterboard

Wa'terĀ·board` noun A board set up to windward in a boat, to keep out water. Ham. Nav. Encyc.
Found on http://www.encyclo.co.uk/webster/W/15

Waterboard

• (n.) A board set up to windward in a boat, to keep out water.
Found on http://thinkexist.com/dictionary/meaning/waterboard/
No exact match found