- a contact in billiards, etc, in which the player aims through the centre of the cue ball to the edge of the object ball, so that half the object ball is covered
- (as modifier)a half-ball stroke
Examples from the Web for half-ball
The planet's surface became a half-ball, of which a part lay in darkness.Talents, Incorporated
William Fitzgerald Jenkins
It looks like a half-ball of silver; this appearance is due to a quantity of air.
There was a thin thread of white that ran across the dun-colored range and reached that half-ball and then ended.Space Platform