乾かん船せん渠きょかんせんきょMeanings1noundry dockTechnical term for a dock that can be drained to allow work on a ship's hull. The synonym 乾ドック is more common in everyday use.See also: 乾ドック船ふねは点てん検けんのため乾かん船せん渠きょに入はいった。The ship entered the dry dock for inspection.