Noun
ciclosporin (uncountable)
(pharmacology) An immunosuppressive drug C62H111N11O12 that is a cyclic polypeptide obtained as a metabolite from a fungus (Tolypocladium inflatum) and is used especially to prevent rejection of transplanted organs and in the treatment of rheumatoid arthritis and psoriasis.
Ciclosporin is a commonly used immunosuppressive drug. Source: Internet