from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various North American shrubs or trees of the genus Amelanchier, having white flowers, edible blue-black or purplish fruit, and smooth, gray, striped twigs. Also called Juneberry, shadblow.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The plant Juneberry or serviceberry.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit
From its being in bloom when shad are found in streams.(American Heritage® Dictionary of the English Language, Fourth Edition)
shad + bush, its flowers traditionally being said to appear "when the shad run". (Wiktionary)