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From The Collaborative International Dictionary of English v.0.44 [gcide]:
efficacy \ef"fi*ca*cy\, noun [L. efficacia, fr. efficax. See {Efficacious}.] 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. ''Of noxious efficacy.'' --Milton.
Syn: efficacy.
Syn: Virtue; force; energy; potency; efficiency.
From WordNet (r) 2.0 [wn]:
efficacy
noun: capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine" [syn: {efficaciousness}] [ant: {inefficacy}]
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Definitions retrieved from local copies of the freely distributed DICT client/server software and databases. Click here for database copyright information. - KM |