hagberry

from The Century Dictionary.

• noun A species of cherry, Prunus padus or P. avium. Also called bird-cherry.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.), Scot. A plant of the genus Prunus (Prunus Padus); the bird cherry.

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

• noun A species of cherry native to northern Europe and northern Asia, the bird cherry.
• noun Its bittersweet astringent fruit, readily eaten by birds and Russians.

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

• noun small cherry much liked by birds