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(Agriculture) a synthetic auxin widely used as a weedkiller; 2,4-dichlorophenoxyacetic acid

di•chlo′ro•phe•nox′y•a•ce′tic ac′id

(daɪˈklɔr oʊ fɪˈnɒk si əˈsi tɪk, -əˈsɛt ɪk, daɪˈkloʊr-, daɪˌklɔr oʊ fɪˌnɒk-, daɪˌkloʊr-)

a crystalline powder, C8H6O3Cl2, used for killing weeds. Also called 2,4-D.
References in periodicals archive ?
In promoting the economic interests of a highly influential and powerful fraternity of timber corporations, policymakers and health officials are acting without consideration for that child with 2,4-D in his bloodstream.
2,4-D is one of the world's most widely used pesticides, but debate over its possible carcinogenicity continues.
Although the effect of tissue culture-derived 2,4-D residue is unknown, its use as herbicide has been associated to significant reduction in soil functional stability [10] and increased frequency of certain malignant tumors in humans [11].
The authors report that median urinary 2,4-D concentrations in general U.
The goal of these experiments is to determine the effect of multigenerational exposure of 2,4-D and MCPA on development and identify and determine the changes in gene expression after exposure.
It included the herbicides 2,4-D, mecoprop, and dicamba--one or more of which is in each of 1,500 commercial weed-killing formulations.
Most growers know the difference between the chemicals 2,4-D and MCPA, but don't expect an accurate answer on the exact brand or company that produced it.
The Environmental Protection Agency (EPA) today announced its denial of the 2008 petition by the Natural Resources Defense Council (NRDC) seeking to cancel 2,4-D herbicide registrations and revoke all the tolerances for use.
Department of Agriculture (USDA) today released for public input its Draft Environmental Impact Statements (DEIS), which calls for the deregulation of genetically engineered (GE) corn and soybeans engineered to be tolerant to the toxic herbicide 2,4-D.
Reference doses (RfDs) exist for 2,4-D, and Biomonitoring Equivalents (BEs; concentrations in urine or plasma that are consistent with those RfDs) for 2,4-D have recently been derived and published.
The panel agreed with Health Canada's assessment that 2,4-D can be used safely when used according to label directions, with some uses requiring additional protective measures.
Our hypothesis is that 2,4-D and MCPA increase proliferation at low concentration in presence and absence of FGFs.