ἔξαψις σφοδρὰ μετὰ πολλῆς βίας πίπτουσα ἐπὶ γῆς → a violent flare-up falling on the ground with great force, thunder and lightning
dissidium: a false reading for discidium, q. v., and cf. Madv. ad Cic. Fin. Exc. II. p. 812 sq.