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defoliant

[dee-foh-lee-uh nt] /diˈfoʊ li ənt/
noun
1.
a preparation for defoliating plants.
Origin
1940-1945
1940-45; defoli(ate) + -ant
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for defoliant

defoliant

/diːˈfəʊlɪənt/
noun
1.
a chemical sprayed or dusted onto trees to cause their leaves to fall, esp to remove cover from an enemy in warfare
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 Origin and History for defoliant
adj.

1943, from defoliate + -ant.

Online Etymology Dictionary, © 2010 Douglas Harper
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