What is the difference between effective and efficacy?
effective | efficacy | Related terms |
Having the power to produce a required effect or effects.
Producing a decided or decisive effect.
* Jeremy Taylor
Efficient, serviceable, or operative, available for useful work.
Actually in effect.
Having no negative coefficients.
(military) A soldier fit for duty.
*1876 , , Recollections of the Elkhorn Campaign :
*:The Army of the West reached Corinth sometime after the battle of Shiloh. We were 15,000 effectives , and brought Beauregard's effective force up to 45,000 men.
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(uncountable) Ability to produce a desired amount of a desired effect.
Efficacy is a related term of effective.
As nouns the difference between effective and efficacy
is that effective is a soldier fit for duty while efficacy is ability to produce a desired amount of a desired effect.As an adjective effective
is having the power to produce a required effect or effects.effective
English
Adjective
(en adjective)- The pill is an effective method of birth control.
- The president delivered an effective speech!
- Whosoever is an effective , real cause of doing his neighbour wrong, is criminal.
- How long does it take to make a bunch of civilians an effective military force?
- My effective income after taxes and child support is $500 a month.
- The effective radiated power is determined by multiplying the transmitter power output with the antenna gain.
- The effective voltage of an alternating current is 0.7 times its peak voltage.
- The curfew is effective at midnight.
