ball bearing
1 ENTRIES FOUND:
ball bearing noun
plural ball bearings
ball bearing
noun
plural ball bearings
Learner's 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.滚珠轴承，球轴承（由装在两个钢圈之间的多个小钢球组成）
2
: one of the balls in a ball bearing（滚珠轴承中的一个）钢球，滚珠
