ἔχιδνα

A. viper, Hdt. 3.108, S. Tr. 771, Pl. Smp. 218a, etc.; prob. of a constrictor snake, Act.Ap. 28.3: metaph., of a treacherous wife or friend, A. Ch. 249, S. Ant. 531; ἱματισμένη ἔ., of woman, Secund. Sent. 8; γεννήματα ἐχιδνῶν brood of vipers, term of reproach, in Ev.Matt. 3.7.

II. pr. n. of a monster, Hes. Th. 297, S. Tr. 1099.