autotoxin
/ˌɔtoʊˈtɑksɪn/
noun
- A poisonous substance produced by an organism that is harmful to the organism itself.
- The plant's roots release an autotoxin that stunts its own growth.
- Scientists identified an autotoxin in the fungus that limits its spread.
- Accumulation of autotoxins in the soil can make it difficult for the same crop to grow again.