box elder

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. A North American maple tree (Acer negundo) having pinnately compound leaves with coarsely toothed to lobed leaflets. Also called ash-leaved maple.

from the GNU version of the Collaborative International Dictionary of English

• n. the ash-leaved maple (Negundo aceroides), of North America.
• n. See under 1st Box.

from The Century Dictionary and Cyclopedia

• n. See elder and Negundo.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. common shade tree of eastern and central United States