ball bearing
1 ENTRIES FOUND:
ball bearing
noun
plural
ball bearings
ball bearing
noun
plural
ball bearings
Britannica Dictionary definition of BALL BEARING
[count]
1
:
a part of a machine in which another part (such as a metal pole) turns easily
◊ A ball bearing is made up of several small metal balls that fit between two metal rings.
2
:
one of the balls in a ball bearing
