Abbott-Smith Manual Greek Lexicon
νεφέλη (G3507)
25 νεφέλη , -ης, ἡ ( νέφος ), [in LXX chiefly for עָנָן , also for עָב , etc.;] a cloud (single and specific as opp. to νέφος , a great indefinite mass of vapour): Mt 17:5 24:30 26:64 , Mk 9:7 13:26 14:62 , Lk 9:34 , 35 12:54 21:37 , Ac 1:9 , I Th 4:17 , Ju 12 , Re 1:7 10:1 11:12 14:14-16 ; of the pillar of cloud in the wilderness ( Ex 14:19 , 20 , Ps 104:39 , al.): I Co 10:1 , 2 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain