Sidereal - Meaning, Definition & English Examples
Sidereal refers to something related to the stars or measured by the apparent motion of distant stars, such as sidereal time, which is based on Earth’s rotation relative to fixed stars.
Definition:
Relating to or measured by the apparent motion of stars; celestial.
Synonyms:
stellar, celestial, astronomical, astral
Part of Speech:
adjective
Antonyms:
terrestrial, earthly
Common Collocations:
sidereal time, sidereal day, sidereal year
Derivatives:
sidereally, siderealness
Usage Tips:
Use "sidereal" to describe astronomical phenomena based on star positions rather than solar time.
Common Phrases:
sidereal clock, sidereal month, sidereal astrology
Etymology:
From Latin "sidereus," meaning "starry," derived from "sidus" (star).
Examples:
- 1. The sidereal day is shorter than a solar day.
- 2. Astronomers use sidereal time to track celestial objects.
- 3. Her research focuses on sidereal variations in star brightness.
- 4. The moon completes a sidereal orbit in about 27 days.