2,4-D

noun
\ ˌtü-ˌfȯr-ˈdē How to pronounce 2,4-D (audio) \

Definition of 2,4-D

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

First Known Use of 2,4-D

circa 1945, in the meaning defined above

History and Etymology for 2,4-D

di-

Keep scrolling for more

Learn More About 2,4-D

Time Traveler for 2,4-D

Time Traveler

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

See more words from the same year

Dictionary Entries Near 2,4-D

24-7

2,4-D

2D

See More Nearby Entries 

Statistics for 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 19 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for 2,4-D

2,4-D

noun
\ ˌtü-ˌfōr-ˈdē, -ˌfȯr- How to pronounce 2,4-D (audio) \

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

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!