MEANING
Relating to stars or measuring motion and time against the distant stars rather than the Sun.
Use it for
Words that belong together
- sidereal day
- sidereal period
On the page
She compared the sidereal period with the colony's calendar.
A sidereal clock governed the observatory's nightly alignment.
Related words
Word forms
- Base
- sidereal
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Usage notes
Primary category: sci-fi. Forms: Normally non-gradable in this technical classification; degree language only if a specific measurable context supports it. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.
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