Meaning of POTASSIUM in English
(K), chemical element of Group Ia of the periodic table, the alkali metal group, indispensable for life. Potassium was the first metal to be isolated by electrolysis, by the English chemist Sir Humphry Davy, when he obtained the element (1807) by decomposing molten potassium hydroxide (KOH) with a voltaic battery.
Britannica English vocabulary. Английский словарь Британика. 2012