The Collaborative International Dictionary
Efficacious \Ef`fi*ca"cious\, a. [L. eficax, -acis, fr. efficere. See Effect, n.] Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.
Syn: See Effectual. -- Ef`fi*ca"cious*ly, adv.
Wiktionary
adv. in an efficacious manner
WordNet
adv. in an effective manner; "these are real problems that can be dealt with most effectively by rational discussion" [syn: effectively] [ant: inefficaciously, inefficaciously]
Usage examples of "efficaciously".
And so, in order that He might lead us thereto more efficaciously, He wished to be baptized with a baptism which He clearly needed not, that men who needed it might approach unto it.
It is because thought is so efficaciously corporeal, and not representational, that a single body is forced to contain so many selves.
It was fortuitous, too, that Zilin's father, a brilliant industrial engineer, had been promoted out of Suzhou and transferred to the one place where his skills would be most efficaciously utilized: Shanghai.
In '43 De Haven told me she wanted to reform because some Mexican boyfriend of hers got beat up in the zoot suit riots and she wanted to work more efficaciously for the People's Revolt.