Efficacy

Pronunciation: /ˈɛfɪˌkæsiː/

Efficacy (noun)

  1. How well something produces the result it is meant to produce.
  2. In medicine, how effective a treatment is at improving a condition.
  3. The degree to which evidence shows a method or product achieves its goal.

Examples

  • The device shows efficacy when used correctly.
  • We test efficacy to confirm it works as intended.