depressants

/D IH0 P R EH1 S AH0 N T S/
noun
  1. 1

    A pharmacological substance which decreases neuronal or physiological activity.

    โ€œAlcohol acts first as a stimulant and then as a depressant.โ€

  2. 2

    An agent that inhibits the flotation of a mineral or minerals.

Source: https://en.wiktionary.org/wiki/depressant, https://en.wiktionary.org/wiki/depressants