labarum
lab·a·rum [ ˈla-bə-rəm]
[ˈla-bə-rəm]
: an imperial standard of the later Roman emperors resembling the vexillum
especially : the standard bearing the Chi-Rho adopted by Constantine after he converted to Christianity
First Known Use of labarum
1563, in the meaning defined above
History and Etymology for labarum
Dictionary Entries near labarum