σφραγίς
Alt. σφρα_γίς, ionicσφρηγίς, ῖδος,
I. "a seal, signet, seal-ring", Hdt., Ar., etc.
2. "the gem or stone for a ring", Hdt., Luc.
II. "the impression of a signet-ring, a seal", Soph., Thuc.:—metaph., σφρηγὶς ἐπικείσθω τοῖσδε, as a warrant, Theogn.; γλώσσῃ σφρ. ἐπικείσθω Anth.