ὀκτωκαίδεκα
From LSJ
ἡμῶν δ' ὅσα καὶ τὰ σώματ' ἐστὶ τὸν ἀριθμὸν καθ' ἑνός, τοσούτους ἔστι καὶ τρόπους ἰδεῖν → whatever number of persons there are, the same will be found the number of minds and of characters
English (LSJ)
οἱ, αἱ, τά, indecl.,
A eighteen, Hdt.2.111, etc.
German (Pape)
[Seite 317] achtzehn; Her. 2, 111, Plat. Legg. II, 666 a u. sonst.