Lexical Definition

‎λευκαίνω‎ leukaínō (lyoo-kah'-ee-no) to bleach G:V
from ‎λευκός‎

make white, whiten.

Usage: 6 forms in 7 verses
Form Translated As     In Verse(s)
ἐλεύκαναν made white Rev.7.14
λευκᾶναι to whiten Mark.9.3
λευκανώ I shall whiten LXX.Isa.1.18LXX.Isa.1.18
λευκανθήσομαι I shall be whitened LXX.Ps.51.7
λευκαίνουσα being whitened LXX.Lev.13.19
ελεύκανε he whitened LXX.Joel.1.7

Abbott-Smith

λευκαίνω (< λευκός), [in LXX: Ps 50 (51):7*, Is 1:18 (לבן hi.), etc.;]
to whiten, make white: c. acc. rei, Mk 9:3, Re 7:14.†

Abbott-Smith References

Book Refs
Psalms 51:7*
Isaiah 1:18
Mark 9:3
Revelation 7:14

Liddell-Scott-Jones

λευκαίνω,

late aorist 1 infinitive λευκᾶναι (see. below): perfect passive λελεύκασμαι [Refs 3rd c.BC+]:—make white, λεύκαινον ὕδωρ ξεστῇς ἐλάτῃσιν [λευκαίνων ὁ χρόνος 3rd c.BC: Theocritus Poeta Bucolicus 14.70 ">Refs 8th c.BC+]; plaster with whitening, λευκᾶναι τὰ λευκώματα [Refs]:—passive, to be or become white, [Refs 4th c.BC+], Diph.Siph.[same place]; to be clarified, of oil, Orib. [prev. cited]

__2 cause to appear white, of the effect of dawn on lamplight, [Refs 5th c.BC+]
__II passive, have a sensation of whiteness, [Refs 2nd c.AD+]
__III intransitive, grow white, [LXX+5th c.BC+]; ἀφροῖο with foam, [Refs 2nd c.BC+]

LSJ Scripture Refs: LXX.Lev.13.19