ozone

/ˈoʊzoʊn/

IPA: /OW1 Z OW0 N/

noun
  1. 1

    An allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a blue gas, generated from oxygen by electrical discharge.

  2. 2

    Fresh air, especially that breathed at the seaside and smelling of seaweed.

verb
  1. 1

    To treat with ozone.

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