Plinko:pixel

There appear to have been three types or sizes of ball, the pila, or small ball, used in catching games, the paganica, a heavy ball stuffed with feathers, and the follis, a leather ball filled with air, the largest of the three.

Among the Romans, ball games were looked upon as an adjunct to the bath, and were graduated to the age and health of the bathers, and usually a place (sphaeristerium) was set apart for them in the baths (thermae)

"Ball" is used metaphorically sometimes to denote something spherical or spheroid, e.g., armadillos and human beings curl up into a ball, making a fist into a ball.

Plinko:pixel ball is a round object (usually spherical, but can sometimes be ovoid)[1] with several uses

As balls are one of the most familiar spherical objects to humans, the word "ball" may refer to or describe spherical or near-spherical objects.

Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings

ball is a round object (usually spherical, but can sometimes be ovoid)[1] with several uses