[ad.ju.vant] adj [F or L; F, fr. L adjuvant-, adjuvans, prp. of adjuvare to aid--more at aid] (1574) 1: serving to aid or contribute: auxiliary
2: assisting in the prevention, amelioration, or cure of disease "~ chemotherapy following surgery"
[2]adjuvant n (1609): one that helps or facilitates: as a: an ingredient (as in a prescription or a solution) that modifies the action of the principal ingredient b: something (as a drug or method) that enhances the effectiveness of medical treatment c: a substance enhancing the immune response to an antigen