root knot

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root knot

–noun Plant Pathology.

a disease of plants, characterized by galls or knots on the roots and stunted growth, caused by any of several nematodes of the genus Meloidogyne.

Origin:
1885–90

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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root knot
n. A disease of plants characterized by protuberant enlargements on the roots caused by a nematode.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary

root knot
A disease of plants characterized by protuberant swellings on the roots caused by infestation with nematodes.

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