stimulant

An agent, especially a chemical agent such as caffeine, that temporarily arouses or accelerates physiological or organic activity.

A stimulus or an incentive.

A food or drink, especially an alcoholic drink, believed to have a stimulating effect.

Serving as or being a stimulus; stimulating.

Stimulating; serving to stimulate, incite, or provoke; specifically, in physiology, temporarily quickening some functional or trophic process.

That which stimulates, provokes, or incites; a stimulus; a spur.

In physiology, an agent which temporarily quickens some functional or trophic process.

Serving to stimulate.

Produced increased vital action in the organism, or in any of its parts.

That which stimulates, provokes, or excites.