sidere
sidere is a Latin form of sidus, meaning “star, constellation; heavenly body”. It is the ablative singular neuter noun.
Found 70 times in the Latin texts on Socratos.
Where it is used
Cicero, De Natura Deorum 2.107: … empora sunt duplici fulgore notata e trucibusque oculis duo fervida lumina flagrant atque uno mentum radianti sidere lucet; opstipum caput, at tereti cervice reflexum optutum in cauda maioris figere dicas.
Ovid, Fasti 1.655: Sidere ab hoc ignis venienti nocte, Leonis
All forms of sidus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.