APOTOME, in Geometry, the difference between two incommensurable lines.
ΑΥΤΟΜΕ, in Music, the difference between a greater and lesser semi-tone; expressed by the ratio, 128; 125.
ΑΠΟΤΡΟΠΕΑ, (from ἀποτρέπω, I avert), in the Ancient Poetry, verses composed for averting the wrath of incensed deities; and the deities invoked for averting any threatened misfortune were called Αποτρέποντες; they were also called Alexiaci, from ἀλέγω, I drive away; and Averunci from averruncus, which denotes the same.