gauge for indicating the level of water in e.g. a tank or boiler or reservoir
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
the part of the earth's surface covered with water (such as a river or lake or ocean)
a facility that provides a source of water
once thought to be one of four elements composing the universe (Empedocles)
a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
