Abbott-Smith Manual Greek Lexicon
ἀπ-αύγασμα (G541)
1 **† ἀπ-αύγασμα , -τος, τό ( αὐγή , brightness , whence ἀπαυγάζω , to radiate or reflect ), [in LXX: Wi 7:26 *;] of light beaming from a luminous body, radiance , effulgence : He 1:3 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain