anti-stimulant

noun

1. Physiology, Medicine/Medical. something that temporarily quickens some vital process or the functional activity of some organ or part: Adrenalin is a stimulant for the heart.Compare depressant(def 4).
2. any food or beverage that stimulates, especially coffee, tea, or, in its initial effect, alcoholic liquor.
3. a stimulus or incentive.

adjective

4. Physiology, Medicine/Medical. temporarily quickening some vital process or functional activity.
5. stimulating.

noun

1. a drug or similar substance that increases physiological activity, esp of a particular organ
2. any stimulating agent or thing

adjective

3. increasing physiological activity; stimulating

1772 (adj.); 1794 (n.), from Latin stimulantem (nominative stimulans), present participle of stimulare (see stimulation).

n.

1. An agent that arouses organic activity, strengthens the action of the heart, increases vitality, and promotes a sense of well-being.

adj.

1. Serving as or being a stimulant.

1. An agent, especially a drug, that causes increased activity, especially of the nervous or cardiovascular systems. Caffeine is a commonly used stimulant.