That part of the sea out of sight of land.
A sea open to all nations, i.e. not a mare clausum.
A large body of salt water.
A body of salt water smaller than an ocean, generally forming part of, or connecting with, an ocean or a larger sea.
Living or used in or on the sea; of, near, or like the sea.
A very large lake of liquid hydrocarbon.
A lake, especially if large or if salty or brackish.
The swell of the sea; a single wave; billow.
A constant flux of gluons splitting into quarks, which annihilate to produce further gluons.
The ocean; the continuous body of salt water covering a majority of the Earth's surface.
A large, dark plain of rock; a mare.
Anything resembling the vastness or turbulence of the sea.