Sidereal
/sɪˈdɪə.ri.əl/noun
Relating to the stars or constellations.
Did you know?The term 'sidereal' is deeply tied to ancient astrology, used to determine the timing of celestial rituals and events based on the stars' positions.
Etymological Timeline
Proto-Indo-European
PIE
*sīde-
“to sit, settle, or inhabit, often associated with celestial bodies.”
Ancient Greek
Greek
ἀστερισμός (asterismos)
“starry, pertaining to stars or constellations.”
Latin
Latin
sideralis
“of the stars, starry.”
Middle English
Middle English
siderial
“relating to the stars, often used in astrological contexts.”
Modern English
English
sidereal
“of or relating to the stars, especially in terms of their positions in the sky.”