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Definition of Efficacy

Efficacy

  1. Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer.

Efficacy Quotations

The metaphor is perhaps one of man's most fruitful potentialities. Its efficacy verges on magic, and it seems a tool for creation which God forgot inside one of His creatures when He made him.
Jose Ortega y Gasset

But the power of instruction is seldom of much efficacy, except in those happy dispositions where it is almost superfluous.
Edward Gibbon

Every single instance of a friend's insincerity increases our dependence on the efficacy of money.
William Shenstone

I would like to cite an instance which proves the efficacy of clean living on the part of an athlete coupled with the inspiration received from a champion which go a long way to making a champion.
Major Taylor

My proposal now is to test a vaccine first on people who have been infected, and if you show some efficacy at this level, you might be able to go further to study uninfected people in a population with a high rate of infection.
Luc Montagnier
More "Efficacy" Quotations

Efficacy Translations

efficacy in German is Zugkraft, Wirkungskraft
efficacy in Spanish is eficacia
efficacy in Swedish is verkan, verksamhet

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