Dictionary entry

νυχθήμερος

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

*† νυχθήμερος, -α, -ον

(< νύξ, ἡμέρα, v. B1., § 28, 4),

lasting a night and a day; as subst., (τὸ) ν., a night and a day: II Co 11:25 (pl., Or. Sib., 8, 203).†