Sideral
/sɪˈdɪərəl/noun
Relating to the stars or to sidereal time.
Did you know?Sideral comes from Latin sidus, “star” or “constellation,” the same root traditionally linked with consider: originally, to examine something as though reading the stars.
Etymological Timeline
Proto-Indo-European
PIE
*sweid-
“A proposed Indo-European root associated with shining or brightness; its connection to Latin sidus is scholarly but not completely certain.”
Classical Latin
Latin
sidus
“A star, constellation, or heavenly body.”
Classical Latin
Latin
sideralis
“Of or belonging to the stars; stellar.”
Medieval Latin
Latin
sideralis
“Relating to the stars, celestial bodies, or the heavens.”
17th Century
English
sideral
“Relating to the stars; an English borrowing from Latin and French learned usage.”
Modern English
English
sideral
“Relating to stars, especially in technical, poetic, or astronomical contexts.”
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