Definition of EFFICACIOUS

efficacious

Adjective

  • marked by qualities giving the power to produce an intended effect; -Aldous Huxley
    • "written propaganda is less efficacious than the habits and prejudices...of the readers"
    • "the medicine is efficacious in stopping a cough"
  • producing or capable of producing an intended result or having a striking effect; -LewisMumford
    • "an efficacious law"

Adj

  • Effective; possessing efficacy.

Examples

  • This medicine is efficacious.

Origin / Etymology

From Old French efficacieux, from Latin efficāx (“efficacious”) + -ous, from efficere (“to effect, to accomplish”); see effect.

Synonyms

effective, effectual

Scrabble Score: 21

efficacious: valid Scrabble (US) TWL Word
efficacious: valid Scrabble Word in Merriam-Webster MW Dictionary
efficacious: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 24

efficacious: valid Words With Friends Word