Golf ball
A golf ball was a special white ball designed to be used in the Earth game of golf.

In 2377, The Doctor had a ball and club ready to play on the holodeck at Saint Andrews, but cancelled so that Tom Paris and B'Elanna Torres could spend three hours together on Gedi Prime. A bit later, he was practicing putting in sickbay aboard  and a ball went out into the corridor. ()

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Earth
Sporting equipment