A valve sealing off an opening through a ship's hull below or near to the waterline (e.g. one connecting a ship's sewage system to the sea).
（船的）通海旋塞，海水阀
Example sentencesExamples
Consider removing the hose from the lowest seacock and leaving it open.
Internal loops in the water passages typically prevent complete drainage, so disconnect the raw-water connection from the closed seacock and submerge it in a 50-50 antifreeze mix.
Since the seacock was left open, water poured in and sank the boat.
Out of the water an open seacock still admits moisture, frigid air, and perhaps vermin, so close them.
After the seacock or gate valve is closed, remove the hose temporarily so that it drains and then use an absorbent cloth or turkey baster to eliminate any residual water in the nipple.
Rhymes
Leacock, peacock
Definition of seacock in US English:
seacock
nounˈsēkäk
A valve in an opening through a ship's hull below or near the waterline (especially one connecting a ship's engine-cooling system to the sea).
（船的）通海旋塞，海水阀
Example sentencesExamples
Internal loops in the water passages typically prevent complete drainage, so disconnect the raw-water connection from the closed seacock and submerge it in a 50-50 antifreeze mix.
Out of the water an open seacock still admits moisture, frigid air, and perhaps vermin, so close them.
After the seacock or gate valve is closed, remove the hose temporarily so that it drains and then use an absorbent cloth or turkey baster to eliminate any residual water in the nipple.
Since the seacock was left open, water poured in and sank the boat.
Consider removing the hose from the lowest seacock and leaving it open.