λεύκανσις
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
-εως, ἡ, a growing white, Arist.Ph.224b15, Alex.Aphr.in Top.304.1; clarification of oil, Gal. 11.484.
German (Pape)
[Seite 33] ἡ, das Weißmachen, Arist. phys. 5, 6.
Greek (Liddell-Scott)
λεύκανσις: ἡ, τὸ λευκαίνειν ἢ λευκαίνεσθαι, Ἀριστ. Φυσ. 5. 1, 5, κτλ.
Russian (Dvoretsky)
λεύκανσις: εως ἡ побеление Arst.