sulphates

/S AH1 L F EY0 T S/
noun
  1. 1

    Any ester of sulfuric acid.

  2. 2

    Any salt of sulfuric acid.

verb
  1. 1

    To treat something with sulfuric acid, a sulfate, or with sulfur dioxide.

  2. 2

    (of a lead-acid battery) To accumulate a deposit of lead sulfate.

Source: https://en.wiktionary.org/wiki/sulfate, https://en.wiktionary.org/wiki/sulphate, https://en.wiktionary.org/wiki/sulphates