allelochemical

noun

al·​le·​lo·​chem·​i·​cal

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

Word History

Etymology

allelo- + chemical entry 2

First Known Use

1971, in the meaning defined above

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now