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 April 2025

BRIGHT

(adjective) made smooth and bright by or as if by rubbing; reflecting a sheen or glow; “bright silver candlesticks”; “a burnished brass knocker”; “she brushed her hair until it fell in lustrous auburn waves”; “rows of shining glasses”; “shiny black patents”


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Coffee Trivia

The average annual yield from one coffee tree is the equivalent of 1 to 1 1/2 pounds of roasted coffee. It takes about 4,000 hand-picked green coffee beans to make a pound of coffee.

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