πυγίδιον
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)
τό, Dim. of πυγή, Ar.Ach.638, Eq.1368.
German (Pape)
[Seite 813] τό, dim. von πυγή, kleiner, magerer Steiß, Ar. Ach. 613 Equ. 1365.
Greek (Liddell-Scott)
πῡγίδιον: τὸ, ὑποκορ. τοῦ πυγή, λεπτὴ πυγή, ἰσχνὰ ὀπίσθια, Ἀριστοφ. Ἀχ. 638, Ἱππ. 1368.
French (Bailly abrégé)
ου (τό) :
dim. de πυγή.