Search Result for "efficaciousness": 
Wordnet 3.0

NOUN (1)

1. capacity or power to produce a desired effect;
- Example: "concern about the safety and efficacy of the vaccine"
[syn: efficacy, efficaciousness]



The Collaborative International Dictionary of English v.0.48:

efficaciousness \ef`fi*ca"cious*ness\ n.
   the capacity or power to produce a desired effect.

   Syn: efficacy.
        [WordNet 1.5]


WordNet (r) 3.0 (2006):

efficaciousness
    n 1: capacity or power to produce a desired effect; "concern
         about the safety and efficacy of the vaccine" [syn:
         efficacy, efficaciousness] [ant: inefficaciousness,
         inefficacy]