Definition of "hailstone" [hail•stone]

• A pellet of hail. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Federal climate officials have confirmed the hailstone is the heaviest ever recorded on the continent."
• "A shower of rain drove down upon us, each drop stinging like a hailstone."
• "Dionne Searcey/The Wall Street Journal Mr. Scott let National Weather Service meteorologists cast molds of the hailstone at their lab in Boulder, but he wouldn't let them dissect it."