Georgium Sidus

English Etymology en la Geōrgium Sīdus. en Q14277 1781 1, after King George III. Proper noun 1 en astronomy obsolete The planet Uranus. from 18th c. en 1783 w:William Herschel Philosophical transactions of the Royal Society of London 73.2 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. 1812, Thomas Jefferson, letter, 17 June: The exclusion from the courts of the malign influence of all authorities after the Georgium sidus became ascendant, would uncanonize Blackstone. en 1821 James Ferguson Astronomy II 86 The satellites of the Georgium Sidus, too, appear to move nearly at right angles to the plane of his orbit en eponyms en Planets of the Solar System