billiard ball
US /ˈbɪl.jɑːrd bɔːl/
UK /ˈbɪl.jɑːrd bɔːl/

1.
台球, 撞球
a small, hard, spherical ball used in games like billiards, pool, or snooker
:
•
The cue ball struck the eight billiard ball with precision.
主球精确地击中了八号台球。
•
He polished each billiard ball before the game.
他在比赛前擦亮了每一颗台球。