movimiento constante o perpetuo ref. al pulso ἐν τῇ τῆς ἀεικινησίας διαστολῇ καὶ συστολῇ Gal.19.376, ἡ ἀ. τοῦ αἰθέρος Procl.in Prm.1120, ἀγγελικὴ ἀ. Dion.Ar.DN 6.1, cf. IP 333a.35 (II d.C.), Syrian.in Metaph.37.13, Simp.in Ph.435.13, 25.