Abbott-Smith Manual Greek Lexicon
σκοτία (G4653)
16 † σκοτία , -ας, ἡ [in LXX: Jb 28:3 ( אֹפֶל ), Mi 3:6 ( חָשְׁכָה ), Is 16:3 * ;] in late writers = σκότος , darkness : Jo 6:17 20:1 . Metaph., of secrecy (opp. to ἐν τ. φωτί ): Mt 10:27 , Lk 12:3 ; of spiritual darkness: Mt 4:16 , Jo 1:5 8:12 12:35 , 46 , I Jo 1:5 2:8 , 9 , 11 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain