Root Wad : (Synonym: Root plate, root ball): The mass of roots and soil which is exposed when a tree is wind-thrown or pushed over without being severed or broken off from the stump
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}