εὐθύγραμμον

From LSJ

πῶς δ' οὐκ ἀρίστη; τίς δ' ἐναντιώσεται; τί χρὴ γενέσθαι τὴν ὑπερβεβλημένην γυναῖκα; (Euripides' Alcestis 152-54) → How is she not noblest? Who will deny it? What must a woman have become to surpass her?

Source

Russian (Dvoretsky)

εὐθύγραμμον: τό (sc. σχῆμα) прямолинейная фигура Arst., Plut.