Z |
| noun
- The twenty-sixth and last letter of the Appendix:Roman script, English alphabet, preceded by Y.
| | zenith |
| noun
- (astronomy)
- The point in the celestial sphere opposite the nadir.
- The point in the sky vertically above a given position or observer.
- The highest point in the sky reached by a celestial body.
- Highest point or state; peak.
| zodiacal light |
| noun
- (astronomy) soft glow of white light extending upward from the horizon along the ecliptic, particularly in the tropics.
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