Efficacy Definition & Meaning
efficacy
- noun
- capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"
"Efficacy" in song lyrics
See how efficacy is used in real songs:
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"mumps vaccine efficacy"
AOL — AOL -
"concept of self efficacy"
AOL — AOL -
"teacher efficacy"
AOL — AOL
Words that rhyme with efficacy
Usage tips for "efficacy"
Understanding the precise definition of a word helps you use it with confidence. When using "efficacy" in your writing, consider whether you need the word itself or one of its synonyms — subtle differences in meaning can change the tone of a sentence. If you're writing poetry or song lyrics, check the rhymes for efficacy to find words that pair well.