σφραγιστής

οῦ, ὁ
A. sealer, title of Egyptian priests who sealed the victim before sacrifice, Plu. 2.363b (cf. μοσχοσφραγιστής): also, witness who seals a will, BGU 361 iii 13 (ii A.D., pl.).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project