'Efficacious' definitions:

Definition of 'efficacious'

(from WordNet)
adjective
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]
adjective
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]

Definition of 'Efficacious'

From: GCIDE
  • 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]

Words containing 'Efficacious'