Dictionary entry

εἴκοσι(ν)

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

εἴκοσι (never -ιν in WH, cf. Bl., §5, 3, and note), indecl., οἱ, αἱ, τά,

twenty: Lk 14:31, Jo 6:19, Ac 1:1527:28, I Co 10:8, Re 4:4, 105:811:1619:4.†