from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A disease caused by a rust fungus (Gymnosporangium juniperi-virginianae) that spends part of its life cycle on certain junipers, causing galls and twig dieback, and the remainder of its life cycle on susceptible apples or crab apples, causing lesions and early shedding of leaves or fruit.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. rust fungus causing rust spots on apples and pears etc
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