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antidepressant

[an-tee-di-pres-uh nt, an-tahy-]Pharmacology
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adjective
  1. of or relating to a substance that is used in the treatment of mood disorders, as characterized by various manic or depressive affects.
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noun
  1. Also called energizer, psychic energizer. any such substance, as a tricyclic antidepressant, MAO inhibitor, or lithium.
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Also an·ti-de·pres·sant, an·ti·de·pres·sive [an-tee-di-pres-iv, an-tahy-] /ˌæn ti dɪˈprɛs ɪv, ˌæn taɪ-/.

Origin of antidepressant

First recorded in 1960–65; anti- + depressant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for antidepressant

antidepressant

noun
  1. any of a class of drugs used to alleviate depression
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adjective
  1. of or relating to this class of drugs
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for antidepressant

n.

1876, from anti- + depressant.

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Online Etymology Dictionary, © 2010 Douglas Harper

antidepressant in Medicine

antidepressant

(ăn′tē-dĭ-prĕsənt, ăn′tī-)
n.
  1. A drug used to prevent or treat depression.
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Related formsan′ti•de•pressant null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

antidepressant in Science

antidepressant

[ăn′tē-dĭ-prĕsənt, ăn′tī-]
  1. A drug used to prevent or treat depression.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.