Thesaurus

efficacious

adjective

Synonyms and Antonyms of efficacious

efficacious was our Word of the Day on 06/16/2011. Hear the podcast!


Learn More about efficacious


Seen and Heard

What made you want to look up efficacious? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

clear to the understanding

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!