Abbott-Smith Manual Greek Lexicon
νέφος (G3509)
1 νέφος , -ους, τό , [in LXX for עָב , שַׁחַק , עָנָן ;] a mass of clouds , a cloud (cf. νεφέλη ); metaph. (as in Hom., Hdt., al.), of a dense throng: He 12:1 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain