black knot Hear it!

black knot definition

☆ black knot

a disease of cherry and plum trees caused by a fungus (Plowrightia morbosa), in which hard, black swellings appear on twigs and branches

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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