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water polo

(Encyclopedia)water polo, swimming game encompassing features of soccer, football, basketball, and hockey. The object of the game is to maneuver, by head, feet, or hand, a leather-covered ball 27 to 28 in. (about 7...

polo

(Encyclopedia)polo, indoor or outdoor ball and goal game played on horseback. Some historians claim that polo originated in Persia in the 6th cent.; it spread to Turkey, India, and Tibet and, with some modificati...

Marco Polo

(Encyclopedia)Marco Polo: see Polo, Marco.

Polo, Marco

(Encyclopedia)Polo, Marco märˈkō pōˈlō [key], 1254?–1324?, Venetian traveler in China. His father, Niccolò Polo, and his uncle, Maffeo Polo, had made (1253–60) a trading expedition to Constantinople. A w...

water

(Encyclopedia)CE5 A. Water molecule (black circles represent valence-shell electrons) B. Structure of ice: Each oxygen atom (white circles) is bonded to four other oxygen atoms by hydrogen bonds, the hydrogen at...

water supply

(Encyclopedia)water supply, process or activity by which water is provided for some use, e.g., to a home, factory, or business. The term may also refer to the supply of water provided in this way. In the United Sta...

water bug

(Encyclopedia)water bug, name for a large number of water-living bugs, comprising several families of the order Hemiptera (true bugs). All have jointed, sharp, sucking beaks, breathe air, and undergo gradual metamo...

water rights

(Encyclopedia)water rights, in law, the qualified privilege of a landowner to use the water adjacent to or flowing through his property. The privilege, also known as riparian rights, may be modified or even denied ...

water glass

(Encyclopedia)water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. Chemically it is sodium silicate, potassium...

navigable water

(Encyclopedia)navigable water, in the broadest sense, a stream or body of water that can be used for commercial transportation. When, as in the early common law, the term is restricted to waters affected by tides, ...