ἐπιδιδυμίς
From LSJ
πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip
English (LSJ)
-ίδος, ἡ, (δίδυμος ΙΙ) in Anatomy, epididymis, Gal.4.565.
German (Pape)
[Seite 938] ίδος, ἡ, die Haut, die die Hoden (δίδυμοι) umschließt, Medic.