EFFICACY

efficacy, efficaciousness

(noun) capacity or power to produce a desired effect; “concern about the safety and efficacy of the vaccine”

Source: WordNet® 3.1


Etymology

Noun

efficacy (usually uncountable, plural efficacies)

Ability to produce a desired effect under ideal testing conditions.

Degree of ability to produce a desired effect.

Synonyms

• efficacity

Source: Wiktionary


Ef"fi*ca*cy, n. Etym: [L. efficacia, fr. efficax. See Efficacious.]

Definition: 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.

– Virtue; force; energy; potency; efficiency.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

22 February 2025

ANALYSIS

(noun) the use of closed-class words instead of inflections: e.g., ‘the father of the bride’ instead of ‘the bride’s father’


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Coffee Trivia

Coffee has initially been a food – chewed, not sipped. Early African tribes consume coffee by grinding the berries together, adding some animal fat, and rolling the treats into tiny edible energy balls.

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