from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various plant diseases caused by fungi, especially of the family Erysiphaceae, that produce powdery conidia on the host surface.
- noun A fungus causing such a disease.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of various fungi of the genus Erysiphe producing powdery conidia on the host surface
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