Uranium

google

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late 18th century: modern Latin, from Uranus: compare with tellurium.

wiktionary

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After Uranus (the planet), +‎ -ium.

etymonline

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uranium (n.)

rare metallic element, 1797, named 1789 in Modern Latin by its discoverer, German chemist and mineralogist Martin Heinrich Klaproth, for the recently found planet Uranus (q.v.).