Lewis & Short

encȳclĭos, on, adj., = ἐγκύκλιος, of or belonging to a circle: disciplina = ἐγκύκλιος παιδεία, the circle of arts and sciences, the course of study which every Grecian youth went through before entering upon professional studies, Vitr. 1, 1; 6 praef.; cf. Quint. 1, 10, 1.