A retractable fin or keel on a sailboat that can be raised or lowered to improve handling and prevent sideslipping in water.
From center (positioned in the middle of the boat) plus board (a wooden or metal plate). This nautical term emerged in the 18th-19th centuries as boat design advanced.
The centerboard was a game-changer for sailing—it let smaller boats with shallow drafts sail efficiently in coastal waters where deep-keeled ships couldn't go, completely changing naval exploration and trade routes.
Complete word intelligence in one call. Free tier — 50 lookups/day.