Sidereal

/saɪˈdɪriəl/

adjective

Relating to stars or constellations.

The scientist explained the sidereal time to his students.

Scientific

Definition 1 of 3

Pro Tip 1/2

Primarily used in astronomy to discuss phenomena related to the stars.

The astrophysicist spoke about sidereal rotations.

Pro Tip 2/2

Don't confuse 'sidereal' with 'solar', which relates to the sun.

Sidereal is concerned with stars, unlike solar calendars.

astralastronomicalcelestialgalacticheavenstarrystella

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