πεντηκόντερος
From LSJ
τὸ ἀγαθὸν αἱρετόν· τὸ δ' αἱρετὸν ἀρεστόν· τὸ δ' ἀρεστὸν ἐπαινετόν· τὸ δ' ἐπαινετὸν καλόν → what is good is chosen, what is chosen is approved, what is approved is admired, what is admired is beautiful
English (LSJ)
(sc. ναῦς), ἡ,
A ship with fifty oars, Pi.P. 4.245, IG12.23, Hdt.1.152, al., Th.1.14 ; πεντηκόντ-ορος is v.l. in Pi. l. c., Hdt. 6.138, Th. l. c., and is found in E.IT 1124 (lyr.), Marm.Par. 15.
German (Pape)
[Seite 558] ἡ, = πεντηκόντορος, Her. 3, 124 u. öfter.