Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

dieldrin

play
noun diel·drin \ˈdēl-drən\

Definition of dieldrin

  1. :  a white crystalline persistent toxic chlorinated compound C12H8Cl6O used especially formerly as an insecticide



Origin of dieldrin

Diels-Alder reaction (an addition reaction forming a 6-membered ring), after Otto Diels & Kurt Alder


First Known Use: circa 1949


Medical Dictionary

dieldrin

play
noun diel·drin \ˈdē(ə)l-drən\

Medical Definition of dieldrin

  1. :  a white crystalline persistent chlorinated hydrocarbon insecticide C12H8Cl6O



Biographical Note for dieldrin

Diels \ˈdē(ə)ls\play Otto Paul Hermann (1876–1954), and Al·der \ˈȯl-dər\play Kurt (1902–1958), German chemists. Diels and Alder made an important contribution to organic chemistry with their development of a method for synthesizing a ring of six carbon atoms. This is now known as the Diels-Alder reaction, from which aldrin and dieldrin are derived. In 1928 Diels and Alder published their first paper on the subject. The insecticides aldrin and dieldrin were first prepared by the method which is now widely used in the synthesis of organic compounds. Diels and Alder were awarded the Nobel Prize for Chemistry in 1950.


Learn More about dieldrin

  1. Medical Dictionary: Definition of "dieldrin"


Seen and Heard

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

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift kittly-benders duvet pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ