Lewis & Short

paeon, ōnis (paean, ānis, Cic. Or. 64, 215 v. h. v.), m., = παιών, a metrical foot of four syllables, three short and one long (and which, acc. to the position of the long syllable, is called primus, secundus, tertius, quartus), Cic. de Or. 3, 47, 183; Quint. 9, 4, 47; 87; 110; Diom. p. 477 P.; Don. p. 1739 ib.; Mar. Vict. p. 1957.