[po.tas.si.um] n, often attrib [NL, fr. potassa potash, fr. E potash] (ca. 1807): a silver-white soft light low-melting univalent metallic element of the alkali metal group that occurs abundantly in nature esp. combined in minerals
POTASSIUM
Meaning of POTASSIUM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012