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clubroot

[kluhb-root, -roo t]
noun
  1. Plant Pathology. a disease of cabbage and other cruciferous plants, characterized by enlarged, malformed roots, caused by a slime mold, Plasmodiophora brassicae.
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Origin of clubroot

First recorded in 1840–50; club + root1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for club root

club root

noun
  1. a disease of cabbages and related plants, caused by the fungus Plasmodiophora brassicae, in which the roots become thickened and distorted
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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