- a valve in the hull of a vessel for admitting outside water into some part of the hull, as a ballast tank.
Origin of seacock
Also called sea connection.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for seacock
The fireroom is full of water; but it looks to me as though a seacock had been opened.Ruth Fielding Homeward Bound
Alice B. Emerson
- nautical a valve in the hull of a vessel below the water line for admitting sea water or for pumping out bilge water