Search Result for "efficacious": 
Wordnet 3.0

ADJECTIVE (2)

1. marked by qualities giving the power to produce an intended effect;
- Example: "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley
- Example: "the medicine is efficacious in stopping a cough"

2. producing or capable of producing an intended result or having a striking effect;
- Example: "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford
- Example: "effective teaching methods"
- Example: "effective steps toward peace"
- Example: "made an effective entrance"
- Example: "his complaint proved to be effectual in bringing action"
- Example: "an efficacious law"
[syn: effective, effectual, efficacious]



The Collaborative International Dictionary of English v.0.48:

Efficacious \Ef`fi*ca"cious\, a. [L. eficax, -acis, fr.
   efficere. See Effect, n.]
   Possessing the quality of being effective; productive of, or
   powerful to produce, the effect intended; as, an efficacious
   law.

   Syn: See Effectual. -- Ef`fi*ca"cious*ly, adv.
        [1913 Webster]


WordNet (r) 3.0 (2006):

efficacious
    adj 1: marked by qualities giving the power to produce an
           intended effect; "written propaganda is less efficacious
           than the habits and prejudices...of the readers"-Aldous
           Huxley; "the medicine is efficacious in stopping a cough"
           [ant: inefficacious]
    2: producing or capable of producing an intended result or
       having a striking effect; "an air-cooled motor was more
       effective than a witch's broomstick for rapid long-distance
       transportation"-LewisMumford; "effective teaching methods";
       "effective steps toward peace"; "made an effective entrance";
       "his complaint proved to be effectual in bringing action";
       "an efficacious law" [syn: effective, effectual,
       efficacious] [ant: ineffective, ineffectual,
       uneffective]