ὀρχοτομία
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)
ἡ, A castration, ib.99.
German (Pape)
[Seite 390] ἡ, das Hodenabschneiden, die Entmannung, Sp.
Greek Monolingual
ὀρχοτομία, ἡ (Μ) ορχοτομώ
ευνουχισμός.