society > travel > travel by water > vessel, ship, or boat > equipment of vessel > other equipment of vessel > [noun] > valve or sea-cock (4)
attributive and in the genitive. Designating a type of sea valve which is manually opened outward, and when not in use is kept closed by the…
In a marine steam-engine (see quot. 1858).
‘any one of several valves in the bottom or side of a steamship communicating with the sea below the water-line’ (Cent. Dict.).