Potassium
来自Big Physics
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early 19th century: from potash (earlier potass, from French potasse ) + -ium.
wiktionary
Coined by British chemist Humphry Davy in 1807, from potassa + -ium.
etymonline
potassium (n.)
metallic element, 1807, coined by English chemist Sir Humphry Davy from Modern Latin potassa, Latinized form of potash (q.v.). Davy first isolated it from potash. The chemical symbol K is from Latin kalium "potash," from Arabic al-qaliy "the ashes, burnt ashes" (see alkali). Related: Potassic.
