ἰδιομήκης
From LSJ
ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us
English (LSJ)
ες,
A of their own length, i.e. of the same length each way, of square numbers, Nicom.Ar.2.18.
German (Pape)
[Seite 1236] ες, von eigener Länge; von Zahlen, wie 4 = 2. 2, Nicom. arithm. 2, 18.
