εἰκοσάμηνος
From LSJ
καί τιν᾿ ὀίω αἵματί τ' ἐγκεφάλῳ τε παλαξέμεν ἄσπετον οὖδας ἀνδρῶν μνηστήρων, οἵ τοι βίοτον κατέδουσιν → and I think some one of the suitors that devour your property shall bespatter the vast earth with his blood and brains
English (LSJ)
ον,
A twenty months old, AP7.662 (Leon.).
German (Pape)
[Seite 727] von zwanzig Monaten, Leon. Al. 41 (VII, 662).