Pape
τό, Nacht und Tag, die Zeit von 24 Stunden, NT u. Sp.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)
TBESG
νυχθήμερος, -α, -ον
(< νύξ, ἡμέρα, see B1., § 28, 4),
lasting a night and a day; as subst., (τὸ) ν., a night and a day: 2Co.11:25 (pl., Or. Sib., 8, 203).†
(AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars