Efficacity
The Century Dictionary and Cyclopedia
noun.
The quality of being efficacious; efficaciousness; efficacy; effectiveness.
the GNU version of the Collaborative International Dictionary of English
noun.
Efficacy.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
Efficacy
.
Word Usage
"We must also increase the monitoring of anti-malaria drug efficacity."
Etymologically Related
effect
effective
effectiveness
effectivity
effector
Synonym
Words with the same meaning
efficacy