seacock
/ˈsiːˌkɑk/
noun
- A valve or tap in the hull of a boat or ship that controls the flow of seawater in or out (e.g., for cooling engines, draining sinks, or flushing toilets).
- Before leaving the dock, the captain checked that all seacocks were closed.
- The mechanic replaced the old seacock to prevent leaks in the engine cooling system.
- A faulty seacock caused the bilge to slowly fill with seawater.