Examples from the Web for hailstone
Thus the hailstone grows until the current is no longer strong enough to support it when it falls to the ground.
Dante's poetry seems to come down in hail, rather than in rain—but count me the drops congealed in one hailstone!The Letters of Robert Browning and Elizabeth Barrett Barrett, Vol. 1 (of 2) 1845-1846|Robert Browning and Elizabeth Barrett Barrett
This hailstone is said to have fallen upon the estate of Mr. Moffat of Ord.
Opening this, he exposed to the reporter's bewildered gaze a huge and brilliant diamond—nearly as large as a hailstone.Sixes and Sevens|O. Henry
Still another instance is recorded of a hailstone having fallen in 1849 of nearly twenty feet in circumference.