efficacynoun [ U ]
uk/ˈef.ɪ.kə.si/us/ˈef.ə.kə.si/formalthe ability, especially of a medicine or a method of achieving something, to produce the intended result:
They recently ran a series of tests to measure the efficacy of the drug.
Synonym
Thesaurus: synonyms and related words
Efficient and effective
- a treat idiom
- be firing on all cylinders idiom
- businesslike
- do the trick idiom
- does what it says on the tin idiom
- labour-saving
- miraculous
- organized
- potency
- proactive
- punch
- smooth
- technical
- timesaving
- together
- treat
- trick
- well oiled
- well tried
- worth
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