ri·tux·i·mab 
(rĭ-tŭksĭ-măb′)
(rĭ-tŭksĭ-măb′)n.
A chimeric monoclonal antibody used to treat certain types of non-Hodgkin lymphoma, chronic lymphocytic leukemia, and refractory rheumatoid arthritis.
[ri-, origin unknown + TU(MOR) + -xi- (alteration of CHI(MERIC), influenced by X, Greek letter chi) + m(onoclonal) a(nti)b(ody).]