DDT

noun
\ ˌdē-(ˌ)dē-ˈtē How to pronounce DDT (audio) \

Definition of DDT

: a colorless odorless water-insoluble insecticide C14H9Cl5 that is an aromatic organochlorine banned in the U.S. that tends to accumulate and persist in ecosystems and has toxic effects on many vertebrates

First Known Use of DDT

1943, in the meaning defined above

History and Etymology for DDT

dichlor- + diphenyl + trichlor- (from tri- + chlor-)

Keep scrolling for more

Learn More about DDT

Dictionary Entries near DDT

ddI

DDS

DDSc

DDT

D duct

DDVP

DE

See More Nearby Entries 

Statistics for DDT

Cite this Entry

“DDT.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/DDT. Accessed 16 December 2019.

Keep scrolling for more

More Definitions for DDT

DDT

noun
How to pronounce DDT (audio)

English Language Learners Definition of DDT

: a poisonous chemical that was used especially in the past to protect plants from insects and that is now banned in the U.S.

DDT

noun
\ ˌdē-ˌdē-ˈtē How to pronounce DDT (audio) \

Kids Definition of DDT

: a chemical that was used as an insecticide until it was found to damage the environment

DDT

noun
\ ˌdē-(ˌ)dē-ˈtē How to pronounce DDT (audio) \

Medical Definition of DDT

: a colorless odorless water-insoluble crystalline insecticide C14H9Cl5 that tends to accumulate in ecosystems and has toxic effects on many vertebrates

called also chlorophenothane, dicophane

Keep scrolling for more

More from Merriam-Webster on DDT

Rhyming Dictionary: Words that rhyme with DDT

Spanish Central: Translation of DDT

Nglish: Translation of DDT for Spanish Speakers

Comments on DDT

What made you want to look up DDT? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

having a smooth flowing sound

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

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!