μεσημβρίαmesēmbría

midday; by implication, the south

Greek (New Testament) · G3314

Meanings

1. noon: Acts 22:6.

2. the South: Acts 8:26.

Same root

μέσοςmésos · G3319middle (as an adjective or (neuter) noun)
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 2 times in the Bible.

Acts 8:26 As for Philip, an angel of the Lord said to him, “Go south down the desert road that runs from Jerusalem to Gaza.”
Acts 22:6 “As I was on the road, approaching Damascus about noon, a very bright light from heaven suddenly shone down around me.

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