Abbott-Smith Manual Greek Lexicon
ἥμισυς (G2255)
5 ἥμισυς , -εια, -υ , gen., -ους (late, as in π. , for cl., -εος ; Bl., §8, 4; Mayser, 294), n. p1., ἡμίσια (Rec., cl., -εια ), [in LXX for חֲצִי , מַחֲצִית ;] half ; as adj., agreeing in gender and number with the substantive following, τὰ ἡμίσια τ. ὑταρχόντων , Lk 19:8 . As neut. subst., τὸ ἥμισυ , the half ; ἥ. (anarth.), a half : c. gen., ἥ. καιροῦ , Re 12:14 ; ἕως ἡμίσους τ. βασιλείας μου , Mk 6:23 ; after a cardinal number, ἡμέρας τρεῖς κ. ἥμισυ , Re 11:9 , 11 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain