immunosuppressor
/ˌɪmjənoʊsəˈprɛsər/
noun
- A substance or drug that suppresses the immune system.
- Patients taking an immunosuppressor must be careful to avoid crowds during flu season.
- The doctor prescribed an immunosuppressor to prevent the body from rejecting the new liver.
- Some natural immunosuppressors are found in certain fungi and plants.