Dictionary

2,4–D

noun \ˌtü-ˌfr-ˈdē\

Definition of 2,4-D

:  a white crystalline irritant compound C8H6Cl2O3 used especially as a weed killer

Origin of 2,4-D

di-
First Known Use: circa 1945

2,4–D

noun \ˌtü-ˌfōr-ˈdē, -ˌfr-\   (Medical Dictionary)

Medical Definition of 2,4–D

:  a white crystalline irritant compound C8H6Cl2O3 used as a weed killer—called also 2,4-dichlorophenoxyacetic acid; see agent orange

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