Definitions for golf ball
Random House Webster's College Dictionary
a small dimpled ball with a tough cover and a resilient core of rubber, used in playing golf.
Origin of golf ball:
a small hard ball used in playing golf; dimpled to reduce wind resistance
A small, usually white ball that is designed for use in the game of golf.
A golf ball is a special ball designed to be used in the game of golf. Under the rules of golf, a golf ball weighs no more than 1.620 oz, has a diameter not less than 1.680 in, and performs within specified velocity, distance, and symmetry limits. Like golf clubs, golf balls are subject to testing and approval by the Royal and Ancient Golf Club of St Andrews and the United States Golf Association, and those that do not conform with regulations may not be used in competitions.