νυχθήμερονnychthḗmeron

lasting a night and a day; as as a noun, (τὸ) ν., a night and a day: 2 Corinthians 11:25 (plural, Or.

Greek (New Testament) · G3574

Meanings

Sib., 8, 203).

Same root

νύξnýx · G3571"night" (literally or figuratively)
ἡμέραhēméra · G2250day, i.e. (literally) the time space between dawn and dark, or the whole 24 hours (but several days were usually reckoned by the Jews as inclusive of the parts of both extremes); figuratively, a period (always defined more or less clearly by the context)

Where it appears

Appears 1 times in the Bible.

2 Corinthians 11:25 Three times I was beaten with rods. Once I was stoned. Three times I was shipwrecked. Once I spent a whole night and a day adrift at sea.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.