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σημήιον

Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη -> The first and best victory is to conquer self.
Plato, Laws 626e

Greek (Liddell-Scott)

σημήιον: τό, Ἰων. ἀντὶ σημεῖον.

Dutch (Woordenboekgrieks.nl)

σημήιον -ου, τό Ion. voor σημεῖον.