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Definition
effective in producing an intended effect- The drug is safe and efficacious.
efficacious = effective in producing an intended effect
- You'll find it most efficacious.Margaret Craven -- I Heard the Owl Call My Name
- His naked fangs and writhing lips were uniformly efficacious, rarely failing to send a bellowing on-rushing dog back on its haunches.Jack London -- White Fang
- Indeed, all the treatments the doctors had tentatively employed, without definite results, now seemed almost uniformly efficacious.Albert Camus -- The Plague
- He would weep for hours together, and I verily believe that to the very end this spoiled child of life thought his weak tears in some way efficacious.H.G. Wells -- The War of the Worlds
- And one of the most efficacious remedies that a prince can have against conspiracies is not to be hated and despised by the people,Nicolo Machiavelli -- The Prince
- It is often an indication as to whether or not the procedure will be efficacious.Margaret Atwood -- Alias Grace
- over the years it turned out ... that that most efficacious medicine for whatever ailed him would be cash or credit, the larger the dosage the better.John Hersey -- Hiroshima
- I saw that we must apply some more efficacious remedy, and sent the boys for a chest of signal-rockets we had brought from the wreck.Johann Wyss -- The Swiss Family Robinson
- ...yet she had never found it less efficacious.E.M. Forster -- A Passage to India
- "I do thank you for taking the time, Pomona," Slughorn was saying courteously, "most authorities agree that they are at their most efficacious if picked at twilight."J.K. Rowling -- Harry Potter and the Half-Blood Prince
- And considering the eagerness with which such information is sought by them, and the extent of your reputation, I do not know of a more efficacious advertisement than your biography would give.Benjamin Franklin -- The Autobiography of Benjamin Franklin
- These plants are most efficacious in the inflaming of the brain, and are therefore much used in Confusing and Befuddlement Draughts, where the wizard is desirous of producing hot-headedness and recklessness...J.K. Rowling -- Harry Potter and the Order of the Phoenix
- Doubt not that it will be as efficacious against those of Rappaccini.Nathaniel Hawthorne -- Rappaccini's Daughter
- Undoubtedly it was as good a thing as you could do; though I question if some other oils would not have been equally efficacious.Thomas Hardy -- The Return of the Native
- Only two and threepence a box—warranted efficacious by the Government stamp.Thomas Hardy -- Jude the Obscure
- That was sure, efficacious, and free from danger.Victor Hugo -- Les Miserables
- You follow the world, my young friend, and I tremble lest grace prove not efficacious.Alexandre Dumas -- The Three Musketeers
- If this was an efficacious process for the training of men, I wanted no part of manhood, I was perfectly content with being a boy.Pat Conroy -- The Lords of Discipline
- This is the essential, and, after all, only efficacious security for the rights and privileges of the people, which is attainable in civil society.Alexander Hamilton, James Madison, & John Jay -- The Federalist Papers
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect
efficacious = effective in producing an intended effect