Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of efficacy is as below...

Coefficacy :: Coefficacy (n.) Joint efficacy.

Infringe :: Infringe (v. t.) To hinder; to destroy; as, to infringe efficacy; to infringe delight or power..

Sacramentarian :: Sacramentarian (n.) One who holds extreme opinions regarding the efficacy of sacraments.

Virtuous :: Virtuous (a.) Having power or efficacy; powerfully operative; efficacious; potent.

Virtuate :: Virtuate (v. t.) To make efficacious; to give virtue of efficacy.

Degradation :: Degradation (n.) Diminution or reduction of strength, efficacy, or value; degeneration; deterioration..

Null :: Null (a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.

Weight :: Weight (v. t.) Importance; power; influence; efficacy; consequence; moment; impressiveness; as, a consideration of vast weight..

Charm :: Charm (n.) Anything worn for its supposed efficacy to the wearer in averting ill or securing good fortune.

Avail :: Avail (v. i.) To be of use or advantage; to answer the purpose; to have strength, force, or efficacy sufficient to accomplish the object; as, the plea in bar must avail, that is, be sufficient to defeat the suit; this scheme will not avail; medicines will not avail to check the disease..

Nullity :: Nullity (n.) The quality or state of being null; nothingness; want of efficacy or force.

Force :: Force (n.) Validity; efficacy.

Virtueless :: Virtueless (a.) Destitute of virtue; without efficacy or operating qualities; powerless.

Inefficacy :: Inefficacy (n.) Want of power to produce the desired or proper effect; inefficiency; ineffectualness; futility; uselessness; fruitlessness; as, the inefficacy of medicines or means..

Virtuality :: Virtuality (n.) Potentiality; efficacy; potential existence.

Nullify :: Nullify (a.) To make void; to render invalid; to deprive of legal force or efficacy.

Potentness :: Potentness (n.) The quality or state of being potent; powerfulness; potency; efficacy.

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.

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..

Insignificance :: Insignificance (n.) Want of force or effect; unimportance; pettiness; inefficacy; as, the insignificance of human art..

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