- a soft, waxy, silvery reactive metal that is never found unbound in nature; an element (symbol K) with an atomic number of 19 and atomic weight of 39.0983. The symbol is derived from the Latin kalium.
Etymology: Potassium derives from the word potassa (potash) with the suffix -ium.
- Dutch: kalium , potas
- French: potassium
- German: Kalium
- Italian: potassio
- Spanish: potasio
Supplemental Details:Sponsor an extended definition for potassium for as little as $10 per month. Click here to contact us.