Georgium Sidus

proper noun

The planet Uranus.

OriginLatin Geōrgium Sīdus →
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

proper noun
  1. obsoleteastronomyThe planet Uranus.First known use 18th c.

    The satellites of the Georgium Sidus, too, appear to move nearly at right angles to the plane of his orbit […]

    1821, James Ferguson, Astronomy, volume II, page 86
    2 more examples

    I cannot but wish to take this opportunity of expressing my sense of gratitude, by giving the name Georgium Sidus […] to a star, which (with respect to us) first began to shine under His auspicious reign.

    1783, William Herschel, Philosophical transactions of the Royal Society of London, section 73.2

    The exclusion from the courts of the malign influence of all authorities after the Georgium sidus became ascendant, would uncanonize Blackstone.

    1812, Thomas Jefferson, letter, 17 June

Synonyms & antonyms

Also see
uranus

Origin

  1. LatinGeōrgium Sīdus
  2. EnglishGeorgium Sidus

Learned borrowing from Latin Geōrgium Sīdus. Coined by German-born British astronomer and composer William Herschel in 1781, after King George III.

More words from Latin

Full word history & related roots →
Cite this entry
APA

Georgium Sidus. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Georgium%20Sidus

MLA

“Georgium Sidus.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Georgium%20Sidus. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Georgium Sidus,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Georgium%20Sidus.

Source: Georgium Sidus on Wiktionary, CC BY-SA 4.0.