: an irritant crystalline compound C8H5Cl3O3 used especially formerly chiefly as an herbicide and defoliant

Word History



First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of 2,4,5-T was in 1946

Dictionary Entries Near 2,4,5-T

Cite this Entry

“2,4,5-T.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/2%2C4%2C5-T. Accessed 1 Feb. 2023.

Medical Definition


: an irritant compound C8H5Cl3O3 used especially formerly as an herbicide and defoliant

called also trichlorophenoxyacetic acid

see agent orange
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