Stimulant /(?)/

Stim·u·lant

Stimulant

a.
  1. Serving to stimulate.
  2. Produced increased vital action in the organism, or in any of its parts. (Physiol.)

Stimulant

n.
  1. That which stimulates, provokes, or excites.
    His feelings had been exasperated by the constant application of stimulants.
  2. An agent which produces a temporary increase of vital activity in the organism, or in any of its parts; -- sometimes used without qualification to signify an alcoholic beverage used as a stimulant. (Physiol. & Med.)