βουμέτρης
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
English (LSJ)
βουμέτρου, ὁ, official in charge of sacrifices (Aetol.), Hsch.
Spanish (DGE)
-ου, ὁ encargado de los sacrificios entre los etolios, Hsch.