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, especially coffee, tea, or, in its initial effect, alcoholic liquor.
a stimulus or incentive.
Physiology, Medicine/Medical. temporarily quickening some vital process or functional activity.
Compare depressant.

1720–30; < Latin stimulant- (stem of stimulāns, present participle of stimulāre to goad). See stimulus, -ant

antistimulant, adjective, noun
nonstimulant, noun, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To stimulant
World English Dictionary
stimulant (ˈstɪmjʊlənt)
1.  a drug or similar substance that increases physiological activity, esp of a particular organ
2.  any stimulating agent or thing
3.  increasing physiological activity; stimulating
[C18: from Latin stimulāns goading, from stimulāre to urge on; see stimulus]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

1728; see stimulation.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

stimulant stim·u·lant (stĭm'yə-lənt)
An agent that arouses organic activity, strengthens the action of the heart, increases vitality, and promotes a sense of well-being. adj.
Serving as or being a stimulant.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
stimulant   (stĭm'yə-lənt)  Pronunciation Key 
An agent, especially a drug, that causes increased activity, especially of the nervous or cardiovascular systems. Caffeine is a commonly used stimulant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
Caffeine is well-known for its effect as a natural stimulant.
High inflation is not exactly a great stimulant to the economy, especially over
  prolonged term.
Ephedra was a popular stimulant until strokes and sudden deaths caused public
He had few takers until he began selling dietary supplements, some containing
  the powerful but unregulated stimulant ephedra.
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature