εἴκοσιν (eikosin)
εἴκοσιν is an Ancient Greek form of εἴκοσι, meaning “twenty”. It is the adjective.
Found 427 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 2.86.2: παρέπλευσε δὲ καὶ ὁ Φορμίων ἐπὶ τὸ Ῥίον τὸ Μολυκρικὸν καὶ ὡρμίσατο ἔξω αὐτοῦ ναυσὶν εἴκοσιν, αἷσπερ καὶ ἐναυμάχησεν.
Diogenes Laertius, Vitae philosophorum 6.2.26: … τότε δὲ καὶ ἰσχάδας. ὁ δὲ κεράμιον ὅλον ἔπεμψεν αὐτῷ· καὶ ὅς, σύ, φησίν, ἐὰν ἐρωτηθῇς δύο καὶ δύο πόσα ἐστίν, Εἴκοσιν ἀποκρινῇ; οὕτως οὔτε πρὸς τὰ αἰτούμενα δίδως οὔτε πρὸς τὰ ἐρωτώμενʼ ἀποκρίνῃ. ἔσκωψε δὴ ὡς ἀπεραντολόγον.
Aristophanes, Frogs 1131: ἔχει δʼ ἕκαστον εἴκοσίν γʼ ἁμαρτίας.
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.