cho·ra·gus 
(kə-rāgəs) also cho·re·gus (-rē-, -rā-)
(kə-rāgəs) also cho·re·gus (-rē-, -rā-)n. pl. cho·ra·gi also cho·re·gi (-jī′)
1. One who undertook the expense of providing the chorus in ancient Greek drama.
2. The leader of a group or movement.
[Latin chorāgus, from Greek khorēgos, khorāgos : khoros, chorus; see gher-1 in the Appendix of Indo-European roots + agein, to lead; see ag- in the Appendix of Indo-European roots.]
cho·ragic (-răjĭk) adj.