tree of heaven[trēˈəv-hĕvˈən]
tree of heaven definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a fast-growing ailanthus (Ailanthus altissima), native to China but widely cultivated in the U.S. as a shade tree
tree of heaven definition by American Heritage Dictionary
A deciduous, rapidly growing tree (Ailanthus altissima) native to China, having sweetish fetid male flowers and widely planted in the United States as a street tree because of its resistance to pollution, disease, and insects.