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2,4-D

[too-fawr-dee, fohr-]
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  1. dichlorophenoxyacetic acid.
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dichlorophenoxyacetic acid

[dahy-klawr-oh-fi-nok-see-uh-see-tik, -uh-set-ik, dahy-klohr-, dahy-klawr-oh-fi-nok-, dahy-klohr-]
noun Chemistry.
  1. a white to yellow, crystalline powder, C8H6O3Cl2, slightly soluble in water: used for killing weeds.
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Origin of dichlorophenoxyacetic acid

Also called 2,4-D.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for 2,4-d

2,4-D

noun
  1. a synthetic auxin widely used as a weedkiller; 2,4-dichlorophenoxyacetic acid
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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