black knot

American  

noun

Plant Pathology.

1. a disease of plants, especially of plums and cherries, characterized by black knotlike overgrowths on the branches, twigs, etc., caused by a fungus, Dibotryon morbosa.

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black knot British  

noun

1. a fungal disease of plums and cherries caused by Dibotryon morbosum , characterized by rough black knotlike swellings on the twigs and branches

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Etymology

Origin of black knot

An Americanism dating back to 1835–45

Example Sentences

See Examples For:

black knot

Her hair had been woven then, as now, into a black knot against the nape of her neck.

From "Snow Falling on Cedars: A Novel" by David Guterson

He would remember how rigorously her hair had been woven into a black knot against the nape of her neck.

From "Snow Falling on Cedars: A Novel" by David Guterson

They swarmed like ants about the upraised pole, and she drove them into position—a black knot of men hauling on the triple cordage—left, right, and middle, like the ribs of a tent.

From At a Winter's Fire by Capes, Bernard Edward Joseph

The last group of the Ascomycetes are the “black fungi,” Pyrenomycetes, represented by the black knot of cherry and plum trees, shown in Figure 46.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton

"Well, I 'm sure I wish you would, if you 're any good at a black knot; my heart and my nails are both broke with one here."

From Tom Burke Of "Ours", Volume I by Lever, Charles James