hailstoneEnglishMerriam-Webster Dictionaryhailstone nounhail·stone | \ ˈhāl-ˌstōn \ a pellet of hail Definition : a pellet of hailFirst Known Usebefore 12th century, in the meaning defined abovehailstone nounhail·stone | \ ˈhāl-ˌstōn \ a pellet of hail Definition : a pellet of hailFirst Known Usebefore 12th century, in the meaning defined above