What is the definition of Efficacy? | Dictionary.net

EFFICACY

\ˈɛfɪkəsi], \ˈɛfɪkəsi], \ˈɛ_f_ɪ_k_ə_s_i]\

Definitions of EFFICACY

2011 - English Dictionary Database
1899 - The american dictionary of the english language.
1894 - The Clarendon dictionary
1919 - The Concise Standard Dictionary of the English Language
1914 - Nuttall's Standard dictionary of the English language
1874 - Etymological and pronouncing dictionary of the English language
1871 - The Cabinet Dictionary of the English Language
1790 - A Complete Dictionary of the English Language

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capacity or power to produce a desired effect

2011 - English Dictionary Database
By DataStellar Co., Ltd

Virtue: energy.

1899 - The american dictionary of the english language.
By Daniel Lyons

Efficacious.
Power to produce effects; virtue; energy.

1894 - The Clarendon dictionary
By William Hand Browne, Samuel Stehman Haldeman

Efficacious.
Power to produce effect; effective energy.

1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

Power to produce a given effect.

1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.

Power to produce effects; virtue; power; ability.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

n. Power to produce effects; production of the effect intended; virtue; force; energy.

1871 - The Cabinet Dictionary of the English Language

Production of the consequence intended.

1790 - A Complete Dictionary of the English Language
By Thomas Sheridan

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