Quick Definition
νυχθήμερον, ου, τό n.n. twenty-four hours
Strong's Definition
from 3571 and 2250; a day-and-night, i.e. full day of twenty-four hours
KJV Usage: night and day
UBS Dictionary of the Greek New Testament
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
νυχθήμερον, -ov, τό, (νύξ and ἡμέρα), a night and a day, the space of twenty-four hours: 2 Co. xi. 25. (Alex. Aphr.; Geopon.) Cf. Sturz, De dial. Mac. ete. p. 186; [Soph. Lex. s. v.; cf. W. 25].
Mounce Concise Greek Dictionary
νυχθήμερον nychthēmeron 1x
a day and night, twenty-four hours, 2 Cor. 11:25*
Abbott-Smith Greek Lexicon
*† 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).†
Liddell-Scott-Jones — Greek-English Lexicon
νυχθήμερον (nuchthēmeron) — a night and a day. νυχθ-ήμερος, α, ον, lasting a day and night, δρόμοι [Refs 2nd c.BC+]
II. as substantive νυχθ-ήμερον, τό, a night and a day, the space of [NT+1st c.BC+]