Philochorus (fĭlŏk`ōrəs), fl. 3d cent. B.C., Greek historian. He wrote extensively on Greek religious customs. Philochorus is probably the best known of the many chroniclers of events in Athens and surrounding Attica. His Atthis is a 17-volume history of the region from mythological times to 260 B.C. In 250 B.C., Philochorus was murdered by political enemies.