potassium

/pəˈtæsiəm/

IPA: /P AH0 T AE1 S IY0 AH0 M/

noun
  1. 1

    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.

  2. 2

    A single atom of this element.

Source: https://en.wiktionary.org/wiki/potassium