serving to help or assist; auxiliary.
Medicine/Medical. utilizing drugs, radiation therapy, or other means of supplemental treatment following cancer surgery.
a person or thing that aids or helps.
anything that aids in removing or preventing a disease, especially a substance added to a prescription to aid the effect of the main ingredient.
Immunology. a substance admixed with an immunogen in order to elicit a more marked immune response.
Historical Examples

How the use of yeast as an adjuvant to otherwise inadequate food mixtures exerts its beneficial effect is not yet made clear.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2 Various

There is no scientific evidence that it has any value either alone or as an adjuvant to sandal oil.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2 Various

It is added to other medicines, either as a corrective, or adjuvant.
Birds and Nature Vol. 11 No. 4 [April 1902] Various

This tincture is reputed pectoral and expectorant; but it is chiefly used as an adjuvant in mixtures, on account of its flavour.
Cooley’s Practical Receipts, Volume II Arnold Cooley

Epinephrin, or pituitary extract, is used as an adjuvant intravenously to increase the cardiac movement after it has been started.
The Ethics of Medical Homicide and Mutilation Austin O’Malley

If the patients are bothering their relatives very much it may be necessary to give some opium as an adjuvant.
Psychotherapy James J. Walsh

aiding or assisting
something that aids or assists; auxiliary
(med) a drug or other substance that enhances the activity of another
(immunol) a substance that enhances the immune response stimulated by an antigen when injected with the antigen

adjuvant ad·ju·vant (āj’ə-vənt)

A pharmacological agent added to a drug, predictably affecting the action of the drug’s active ingredient.

An immunological vehicle for enhancing antigenicity, such as a water-in-oil emulsion in which antigen solution is emulsified in mineral oil. Also called immunoadjuvant.


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