τριακόντορος
From LSJ
ἤκουσεν ἐν Ῥώμῃ καὶ ἀρσένων ἑταιρίαν εἶναι → he heard that there was also a fellowship of males in Rome (Severius, commentary on Romans 1:27)
English (LSJ)
(sc. ναῦς), ἡ,
A thirty-oared ship, Th.4.9, X.An.5.1.16, etc.; so written in IG22.1629.121,335 (iv B. C.); but τριακόντερος ib.12.23.4 (restd.), 22.1649.6 (iv B. C.), τριη- Hdt.4.148, 7.97: cf. πεντηκόντορος.