Definitions for: Efficacy

[n] capacity or power to produce a desired effect

Webster (1913) Definition: Ef"fi*ca*cy, n. [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: Virtue; force; energy; potency; efficiency.

Synonyms: efficaciousness

Antonyms: inefficaciousness, inefficacy

See Also: effectiveness, effectivity, effectuality, effectualness

Try our:
Scrabble Word Finder

Scrabble Cheat

Words With Friends Cheat

Hanging With Friends Cheat

Scramble With Friends Cheat

Ruzzle Cheat

Related Resources:
animals starting with k