Lexical Definition

‎ἐξαστράπτω‎ exastráptō (ex-as-trap'-to) to flash forth G:V
from ‎ἐκ‎ and ‎ἀστράπτω‎

glistening.

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ἐξαστράπτων became dazzling Luke.9.29
εξαστραπτόντων flashing LXX.Nah.3.3
εξαστράπτων flashing LXX.Ezek.1.7
εξαστράπτον flashing LXX.Ezek.1.4

Abbott-Smith

ἐξ-αστράπτω [in LXX: Nu 3:3 (בָּרָק), Ez 1:4 (לָקַח hithp.) 1:7 Da LXX 106 (קָלַל)* ;]
to flash like lightning, gleam, be radiant: ἱματισμός, Lk 9:29.†

Abbott-Smith References

Book Refs
Numbers 3:3
Ezekiel 1:4 · 1:7
Luke 9:29

Liddell-Scott-Jones

ἐξαστράπτω,

flash as with lightning, [LXX+NT]; of the sun's light, Zos.Alch.[Refs 5th c.BC+]

LSJ Scripture Refs: LXX.Nah.3.3Luke.9.29