Plural of efficacy
regular plural
The plural of efficacy is efficacies.
Forms of efficacy
| Singular | efficacy /ˈɛf.ɪ.kə.si/ |
|---|---|
| Plural | efficacies |
| Countable | usually uncountable |
Meaning of efficacy
- noun The ability to produce a desired effect under ideal testing conditions.
- noun A degree of ability to produce a desired effect; effectiveness.
Questions about the plural of efficacy
- What is the plural of efficacy?
- The plural of efficacy is efficacies.
- Is efficacy countable?
- Efficacy is usually an uncountable noun; its plural is used for kinds or examples of it.
Source and license
Adapted from Wiktionary: efficacy (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.
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