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black knot

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.


black knot

noun

  1. a fungal disease of plums and cherries caused by Dibotryon morbosum , characterized by rough black knotlike swellings on the twigs and branches
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of black knot1

An Americanism dating back to 1835–45
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Example Sentences

He then secures a massive black knot belt around her waist and escorts her to her place in line.

It is probably what is termed black knot, only the galls have not turned black yet.

Suddenly the black knot of warriors dashed into the obstruction, brandishing spears and clubs, and screaming like maniacs.

It twisted and untwisted the small black knot above the town hotel.

Even on the old Black-knot this fungus may be readily seen, at any time of the year, covering its entire surface.

Happily, black-knot may be controlled by cutting out the diseased wood.

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