centauromachy

from The Century Dictionary.

• noun In art and archaeology, a contest in which centaurs take part; especially, a fight between centaurs and men; in Greek myth, a battle between Hercules and the centaurs, or between the Lapithæ, aided by the Athenians, and the centaurs.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Ancient Art) A fight in which centaurs take part, -- a common theme for relief sculpture, as in the Parthenon metopes.