abatacept

noun

aba·​tac·​ept ˌab-ə-ˈta-ˌsept 

: a protein drug that inhibits the activation of T cells and is administered by injection in the treatment of rheumatoid arthritis

Note: Abatacept is a synthetic protein produced by recombinant DNA technology in which the extracellular domain of a receptor found on the surface of T cells is linked to a modified portion of IgG. Abatacept is marketed under the trademark Orencia.