| a water-in-oil emulsion injected with immunogen (Freund's incomplete adjuvant) or with immunogen and killed mycobacteria (Freund's complete adjuvant) to enhance the immune response to the immunogen. |

Freund's adjuvant (froindz)
n.
A substance consisting of killed microorganisms, such as mycobacteria, in an oil and water emulsion that is administered to induce and enhance the formation of antibodies.