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2,4-D

British  

noun

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

"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

Example Sentences

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The bad news is that higher glyphosate concentrations were linked to lower scores in social perception, while higher 2,4-D concentrations were linked to problems memory and learning, language and attention and inhibitory control.

From Salon • Oct. 12, 2023

The herbicide 2,4-D was developed as a biochemical weapon that would later be used in Agent Orange.

From Los Angeles Times • Aug. 11, 2023

The benzene ring is also found in the herbicide 2,4-D.

From Textbooks • Jun. 9, 2022

The plant in his hands was a Palmer amaranth descendant that had demonstrated resistance to 2,4-D, one of two active ingredients in compounds used to defoliate forests during the Vietnam War.

From New York Times • Aug. 18, 2021

The herbicide 2,4-D has also produced tumorlike swellings in treated plants.

From "Silent Spring" by Rachel Carson