Definition of efficacy

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Efficacy (n.) Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer..

Lern More About Efficacy

Magistery :: Magistery (n.) Mastery; powerful medical influence; renowned efficacy; a sovereign remedy.
Vigor :: Vigor (n.) Strength; efficacy; potency.
Charm :: Charm (n.) Anything worn for its supposed efficacy to the wearer in averting ill or securing good fortune.
Efficacity :: Efficacity (n.) Efficacy.
Vain :: Vain (superl.) Destitute of forge or efficacy; effecting no purpose; fruitless; ineffectual; as, vain toil; a vain attempt..
Weight :: Weight (v. t.) Importance; power; influence; efficacy; consequence; moment; impressiveness; as, a consideration of vast weight..
Virtuous :: Virtuous (a.) Having power or efficacy; powerfully operative; efficacious; potent.
Insignificance :: Insignificance (n.) Want of force or effect; unimportance; pettiness; inefficacy; as, the insignificance of human art..
Virtueless :: Virtueless (a.) Destitute of virtue; without efficacy or operating qualities; powerless.
Potency :: Potency (n.) The quality or state of being potent; physical or moral power; inherent strength; energy; ability to effect a purpose; capability; efficacy; influence.
Null :: Null (a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.
Nullity :: Nullity (n.) The quality or state of being null; nothingness; want of efficacy or force.
Strong :: Strong (superl.) Having virtues of great efficacy; or, having a particular quality in a great degree; as, a strong powder or tincture; a strong decoction; strong tea or coffee..
Inefficaciousness :: Inefficaciousness (n.) Want of effect, or of power to produce the effect; inefficacy..
Virtue :: Virtue (n.) Active quality or power; capacity or power adequate to the production of a given effect; energy; strength; potency; efficacy; as, the virtue of a medicine..
Invalid :: Invalid (a.) Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement..
Prevailment :: Prevailment (n.) Prevalence; superior influence; efficacy.
Available :: Available (a.) Having sufficient power, force, or efficacy, for the object; effectual; valid; as, an available plea..
Potentness :: Potentness (n.) The quality or state of being potent; powerfulness; potency; efficacy.
Coefficacy :: Coefficacy (n.) Joint efficacy.
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