oxidising agent

/AA1 K S AH0 D AY0 Z IH0 NG EY0 JH AH0 N T/
noun
  1. 1

    Any substance that oxidizes, or receives electrons from, another; in so doing, it becomes reduced.

Source: https://en.wiktionary.org/wiki/oxidising%20agent, https://en.wiktionary.org/wiki/oxidizing%20agent