follow Dictionary.com

Word of the Day
Friday, June 08, 2001

Definitions for efficacious

  1. Capable of having the desired result or effect; effective as a means, measure, remedy, etc.

Learn something
new every day


GET OUR


Thank youfor signing up
Get the Word of the Day Email
Citations for efficacious
Lawyers make claims not because they believe them to be true, but because they believe them to be legally efficacious. Paul F. Campos, Jurismania
Henri IV wrote to his son's nurse, Madame de Montglat, in 1607 insisting 'it is my wish and my command that he be whipped every time he is stubborn or misbehaves, knowing full well from personal experience that nothing in the world is as efficacious'. Katharine MacDonogh, Reigning Cats and Dogs: A History of Pets at Court Since the Renaissance
Origin of efficacious
1520-1530
Efficacious is from Latin efficax, -acis, from efficere, "to effect, to bring about," from ex-, "out" + facere, "to do or make."