1. An additive that enhances the effectiveness of medical treatment
   "The vaccine included an adjuvant to boost the immune response"

1. (pharmacology) enhancing the action of a medical treatment
   "the adjuvant action of certain bacteria"
    
2. Furnishing added support
   "an adjuvant discipline to forms of mysticism";
   - accessory, adjunct, ancillary, appurtenant, auxiliary

Derived forms: adjuvants

See also: helpful, supportive

Type of: additive

Encyclopedia: Adjuvant