Epact

Number depending on the relations between the motions of the Earth and Moon; used in computing the ecclesiastical calendar. Epa min on das, 362 B.C. Theban statesman and general who gained a great victory over the Spartans at Leuctra 371 B.C.; 4 times invaded Peloponnesus, and was killed at Mantinea. The supremacy of Thebes began and ended with him.