English dictionary

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English adjective: efficacious

1. efficacious marked by qualities giving the power to produce an intended effect

SamplesWritten propaganda is less efficacious than the habits and prejudices...of the readers.
The medicine is efficacious in stopping a cough.


See alsoeffective, effectual, efficacious

Attributeefficaciousness, efficacy


2. efficacious producing or capable of producing an intended result or having a striking effect

SamplesAn air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation.
Effective teaching methods.
Effective steps toward peace.
Made an effective entrance.
His complaint proved to be effectual in bringing action.
An efficacious law.

Synonymseffective, effectual

Similarhard-hitting, impelling, impressive, rough-and-ready, telling, trenchant

See alsoefficacious, efficient, potent, powerful, stiff, strong, useful, utile

Attributeeffectiveness, effectivity, effectuality, effectualness

Antonymsineffective, ineffectual, uneffective

Based on WordNet 3.0 copyright © Princeton University.
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