Definitions for: Efficacious


[adj] 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"
[adj] 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"



Webster (1913) Definition: 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. --
Ef`fi*ca"cious*ness, n.

Synonyms: effective, effectual, hard-hitting, impelling, impressive, rough-and-ready, telling, trenchant

Antonyms: ineffective, ineffectual, inefficacious, uneffective

See Also: efficacious, efficient, potent, powerful, strong, useful, utile

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