Noun
wooden ball that is struck with mallets in playing polo
Source: WordNetItems required in water polo include: *Ball: A water polo ball is constructed of waterproof material to allow it to float on the water. Source: Internet
The only piece of equipment required by the United States Polo Association (USPA) rules is the helmet or cap with a chin strap. citation The outdoor polo ball is made of a high-impact plastic, but was formerly made of either bamboo or willow root. Source: Internet
The museum also displays a "night polo ball" with a rotating platform on which a candle is placed. Source: Internet
The present-day game involves teams of seven players (plus up to six substitutes), with a water polo ball similar in size to a soccer ball but constructed of waterproof nylon. Source: Internet