mRtyuMjaya (mRtyum + jaya) : victory (jaya) [over?] disease or death(mRtyum).
(I think it's rather rare that a "non-final" component of a tatpuruSa[?]-compound is in an inflected form, instead of the stem form. In this case 'mRtyum' seems to be the accusative [engl. objective] singular, like 'whom' is to 'who' or 'him' is to 'he') http://www.youtube.com/watch?v=zRDOo6eSLh0
