σκωρία
From LSJ
τὸ δὲ ποιεῖν ἄνευ νοῦ ἃ δοκεῖ καὶ σὺ ὁμολογεῖς κακὸν εἶναι: ἢ οὔ → but doing what one thinks fit without intelligence is—as you yourself admit, do you not?—an evil
English (LSJ)
ἡ, (σκῶρ)
A dross of metal, slag, Arist.Mete.383b1, Sens.443a19, Herod.6.83, Str.9.1.23, Dsc.5.80, Simp.in Cael.667.15; written σκωρέα, Zopyr. ap. Orib.14.62.1.
German (Pape)
[Seite 910] ἡ, jeder unreine Abgang, Abfall, Ueberbleibsel, Bodensatz, bes. Schlacken, die beim Ausschmelzen des Eisens abgehen; Arist. meteor. 4, 6; Poll. 7, 99.