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.

any food or beverage that stimulates, esp. coffee, tea, or, in its initial effect, alcoholic liquor.

a stimulus or incentive.

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

stimulating.

noun

depressant

noun

analeptic , bracer , catalyst , drug , energizer , excitant , goad , impetus , impulse , incentive , incitation , incitement , motivation , motive , pick-me-up * , restorative , reviver , shot in the arm , spark plug , spur , stimulus , tonic , uppernotes:a stimulant is a drug; a stimulus is anything encouraging an action (but rarely is it a drug) , encouragement , fillip , inducement , prod , push , stimulation , stimulator , caffein , caffeine , provocation , upper