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!

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.