a medicine or other remedy for counteracting the effects of poison, disease, etc.
something that prevents or counteracts injurious or unwanted effects: Good jobs are the best antidote to teenage crime.
verb (used with object), antidoted, antidoting.
to counteract with an antidote: Medication was given to antidote the poison the child had swallowed.

1400–50; late Middle English (< Middle French) < Latin antidotum < Greek antídoton something given against (i.e., for counteracting), equivalent to anti- anti- + dotón neuter of dotós given, verbid of didónai to give; akin to datum

antidotal, antidotical [an-ti-dot-i-kuhl] , adjective
antidotally, antidotically, adverb

anecdote, antedate, antidote. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
antidote (ˈæntɪˌdəʊt)
1.  med a drug or agent that counteracts or neutralizes the effects of a poison
2.  anything that counteracts or relieves a harmful or unwanted condition; remedy
[C15: from Latin antidotum, from Greek antidoton something given as a countermeasure, from anti- + didonai to give]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1510s, from L. antidotum, from Gk. antidoton "given as a remedy," lit. "given against," verbal adj. of antididonai "give in return," from anti- "against" + didonai "to give" (see date (1)). Related: Antidotal (1640s).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

antidote an·ti·dote (ān'tĭ-dōt')
An agent used to neutralize or counteract the effects of a poison.

an'ti·dot'al (ān'tĭ-dōt'l) adj.
an'ti·dot'al·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
antidote   (ān'tĭ-dōt')  Pronunciation Key 
A substance that counteracts the effects of a poison.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Forgiveness is a powerful antidote and may relieve her suffering.
The perfect antidote to the overactive party machine.
Viewers in need of an antidote to holiday saccharine need look no further.
There is no antidote for the poison, only treatment for its effects.
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