immunomodulator
/ˌɪmjʊnəʊˈmɒdjʊleɪtə/ /ˌɪmjʊnəʊˈmɒdʒʊleɪtə/ /ɪˌmjuːnəʊˈmɒdjʊleɪtə/Medicine and Biology
noun
A substance that modifies the function of the immune system.
Origin
1970s; earliest use found in European Journal Cancer. From immuno- + modulator, after immunomodulation.