Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

allelochemical

noun
al·​le·​lo·​chem·​i·​cal

Definition of allelochemical 

: a toxic chemical produced by a plant in order to defend itself against herbivores or competing plants

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of allelochemical

1971, in the meaning defined above

History and Etymology for allelochemical

allelo- + chemical entry 2

Keep scrolling for more

Learn More about allelochemical

Share allelochemical

Dictionary Entries near allelochemical

allegro form

allele

allelo-

allelochemical

allelomorph

allelopathy

alleluia

Statistics for allelochemical

Look-up Popularity

Time Traveler for allelochemical

The first known use of allelochemical was in 1971

See more words from the same year

Comments on allelochemical

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

Show Comments  Hide Comments 

WORD OF THE DAY

zibeline

a soft lustrous wool fabric with mohair

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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!

Words at Play

Ask the Editors

Word Games