Russian olive

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A small tree (Elaeagnus angustifolia) native to Eurasia and widely naturalized in central and western North America, having narrow silvery leaves, fragrant greenish flowers, and olivelike fruit.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An oleaster, Elaeagnus angustifolia.

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

• noun deciduous shrubby tree of Europe and western Asia having grey leaves and small yellow fruits covered in silvery scales; sometimes spiny