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

Word History

Etymology

di-

First Known Use

circa 1945, in the meaning defined above

Time Traveler
The first known use of 2,4-D was circa 1945

Dictionary Entries Near 2,4-D

Cite this Entry

“2,4-D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/2%2C4-D. Accessed 2 Dec. 2022.

Kids Definition

2, 4-D

noun

ˌtü-ˌfōr-ˈdē,
-ˌfȯr-
: a white compound used as a weed killer

Medical Definition

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

called also 2,4-dichlorophenoxyacetic acid

see agent orange
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