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Word of the Day Tuesday, June 9, 2026

sidereal

/ˌsaɪdɪˈriːəl/ adjective · British & US
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What does sidereal mean?

adjective

Relating to the stars or the period of time between two consecutive passages of a celestial body through a particular point in the sky. Used to describe something that is related to the stars or the night sky.

Example

"The sidereal time was used to calculate the exact position of the planet in the sky."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for sidereal

Antonyms of sidereal

Rhymes with sidereal

Etymologically related