efficacy


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ef·fi·ca·cy

 (ĕf′ĭ-kə-sē)
n.
Power or capacity to produce a desired effect; effectiveness.
[Latin efficācia, from efficāx, efficāc-, efficacious; see efficacious.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

efficacy

(ˈɛfɪkəsɪ) or

efficaciousness

n
the quality of being successful in producing an intended result; effectiveness
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ef•fi•ca•cy

(ˈɛf ɪ kə si)

n.
capacity for producing a desired result or effect; effectiveness.
[1520–30; < Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.efficacy - capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"
efficaciousness
effectiveness, effectivity, effectuality, effectualness - power to be effective; the quality of being able to bring about an effect
inefficaciousness, inefficacy - a lack of efficacy
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

efficacy

noun effectiveness, efficiency, power, value, success, strength, virtue, vigour, use, usefulness, potency, fruitfulness, productiveness, efficaciousness Recent medical studies confirm the efficacy of a healthier lifestyle.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

efficacy

noun
The power or capacity to produce a desired result:
effect, effectiveness, effectuality, effectualness, efficaciousness, efficiency, influence, potency.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations
فاعِلِيَّه
effektvirkning
tehokkuus
verkun, áhrif; gagn
efektywnośćsktuteczność
effektivitet
yararlılık

efficacy

[ˈefɪkəsɪ] N (frm) → eficacia f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

efficacy

[ˈɛfɪkəsi] n → efficacité f
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

efficacy

n → Wirksamkeit f
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

efficacy

[ˈɛfɪkəsɪ] n (frm) → efficacia
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

efficacious

(efiˈkeiʃəs) adjective
producing the result intended. The medicine was most efficacious.
efficacy (ˈefikəsi) noun
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

efficacy

n eficacia, efectividad f; (clinical research) eficacia bajo condiciones controladas; [Note: While English-speaking health professionals often distinguish between efficacy and effectiveness, most Spanish-speaking health professionals use eficacia and efectividad interchangeably.]
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
Mentioned in ?
References in classic literature ?
They are not found to be such on the injustice and violence of individuals, and lose their efficacy in proportion to the number combined together, that is, in proportion as their efficacy becomes needful.
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Yet it is only necessary to abandon the false view (adopted to gratify the "heroes") of the efficacy of the directions issued in wartime by commanders, in order to find this unknown quantity.
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Like most savages they are firm believers in dreams, and in the power and efficacy of charms and amulets, or medicines as they term them.
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But it is given to us sometimes even in our every-day life to witness the saving influence of a noble nature, the divine efficacy of rescue that may lie in a self-subduing act of fellowship.
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(13) Pliny notices the efficacy of the flesh of a tortoise against withcraft.
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The good woman no sooner felt the gold within her palm, than her temper began (such is the efficacy of that panacea) to be mollified.
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A sacred rite of such efficacy that he who finds himself in heaven without having undergone it will be unhappy forever.
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All this coast is much infested with ravenous beasts, monkeys, and serpents, of which last here are some seven feet in length, and thicker than an ordinary man; in the head of this serpent is found a stone about the bigness of an egg, resembling bezoar, and of great efficacy, as it is said, against all kinds of poison.
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Now, I say, is the time when the virtue that is in thee is ripe, and endowed with efficacy to work the good that is looked for from thee."
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The efficacy of various principles is now well understood, which were either not known at all, or imperfectly known to the ancients.
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I wonder who first discovered the efficacy of poetry in driving away love!"
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It would take a strong animal to test the efficacy of his new scheme.
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