[uh-lee-lop-uh-thee, al-uh-lop-]
noun Botany.
suppression of growth of a plant by a toxin released from a nearby plant of the same or another species.

1940–45; < French allélopathie; see allele, -pathy

allelopathic [uh-lee-luh-path-ik, uh-lel-uh-] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
allelopathy (ˌælɪˈlɒpəθɪ)
the inhibitory effect of one living plant upon another by the release of toxic substances
[from French allélopathie, from Greek allēl- one another + pathos suffering]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
allelopathy   (ə-lē-lŏp'ə-thē, āl'ə-)  Pronunciation Key 
The inhibition of growth in one plant species by chemicals produced by another. For example, other plants will often not grow underneath black walnut trees, since these trees produce juglone, a chemical inhibiting plant respiration.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for allelopathic
Allelopathic cover crops to reduce herbicide use in sustainable agricultural systems.
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