adj helping; helpful; assisting.
2. adjuvant ·noun an assistant.
3. adjuvant ·noun a substance added to an immunogenic agent to enhance the production of antibodies.
4. adjuvant ·noun a substance added to a formulation of a drug which enhances the effect of the active ingredient.
5. adjuvant ·noun an ingredient, in a prescription, which aids or modifies the action of the principal ingredient.