efficacious

  • 1 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.… …

    The Collaborative International Dictionary of English

  • 2 efficacious — [ef΄i kā′shəs] adj. [L efficax (gen. efficacis) < efficere, to bring to pass, accomplish (see EFFECT) + OUS] producing or capable of producing the desired effect; having the intended result; effective [an efficacious drug] SYN. EFFECTIVE… …

    English World dictionary

  • 3 efficacious — index active, beneficial, cogent, competent, effective (efficient), functional, influential, politic …

    Law dictionary

  • 4 efficacious — sure to have the desired effect (often of medicines), 1520s, from L. efficaci , stem of efficax (see EFFICACY (Cf. efficacy)) + OUS (Cf. ous). Related: Efficaciously; efficaciousness …

    Etymology dictionary

  • 5 efficacious — effectual, *effective, efficient Analogous words: potent, *powerful, puissant: cogent, telling, sound, convincing, compelling (see VALID) Antonyms: inefficacious: powerless …

    New Dictionary of Synonyms

  • 6 efficacious — [adj] efficient, productive active, adequate, capable, competent, effective, effectual, energetic, influential, operative, potent, powerful, puissant, serviceable, strong, successful, useful, virtuous; concepts 528,537 Ant. incapable,… …

    New thesaurus

  • 7 efficacious — ► ADJECTIVE formal ▪ effective. DERIVATIVES efficaciously adverb efficaciousness noun. ORIGIN from Latin efficere accomplish …

    English terms dictionary

  • 8 efficacious — effective, effectual, efficacious, efficient 1. All these words mean ‘having an effect’ of some kind, but with different applications and shades of meaning. Effective means ‘having a definite or desired effect’ that is actual rather than… …

    Modern English usage

  • 9 efficacious — [[t]e̱fɪke͟ɪʃəs[/t]] ADJ GRADED Something that is efficacious is effective. [FORMAL] The nasal spray was new on the market and highly efficacious. Syn: effective …

    English dictionary

  • 10 efficacious — adjective Etymology: Latin efficac , efficax, from efficere Date: 1528 having the power to produce a desired effect < an efficacious remedy > Synonyms: see effective • efficaciously adverb • efficaciousness noun …

    New Collegiate Dictionary

  • 11 efficacious — efficaciously, adv. efficaciousness, n. /ef i kay sheuhs/, adj. capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough. [1520 30; < L efficaci (s. of efficax)… …

    Universalium

  • 12 efficacious — ef|fi|ca|cious [ˌefıˈkeıʃəs] adj formal [Date: 1500 1600; : Latin; Origin: efficax, from efficere; EFFECT1] working in the way you intended = ↑effective ▪ an equally efficacious method of treatment …

    Dictionary of contemporary English

  • 13 efficacious — adjective formal producing the result that was intended, especially when dealing with an illness or a problem: an equally efficacious method of treatment efficaciously adverb …

    Longman dictionary of contemporary English

  • 14 efficacious — adjective, formal a change in diet may be quite efficacious Syn: effective, effectual, successful, productive, constructive, potent; helpful, beneficial, advantageous, valuable, useful See note at effective …

    Thesaurus of popular words

  • 15 efficacious — adjective effective See Also: effect, effective, effectivity, effectual, efficacity, efficacy, efficiency, efficient …

    Wiktionary

  • 16 efficacious — Synonyms and related words: able, active, adequate, authoritative, capable, charismatic, charming, competent, consequential, effective, effectual, efficient, enchanting, equal to, estimable, functional, go, important, influential, magnetic,… …

    Moby Thesaurus

  • 17 efficacious — I (Roget s IV) modif. Syn. effective, effectual, efficient, productive; see effective . See Synonym Study at effective . II (Roget s Thesaurus II) adjective Producing or able to produce a desired effect: effective, effectual, efficient,… …

    English dictionary for students

  • 18 efficacious — ef|fi|ca|cious [ ,efı keıʃəs ] adjective FORMAL producing the effect that you intended: EFFECTIVE ╾ ef|fi|ca|cious|ly adverb …

    Usage of the words and phrases in modern English

  • 19 efficacious — see EFFECT …

    The Hutchinson dictionary of word origins

  • 20 efficacious — ef·fi·ca·cious || ‚efɪ keɪʃəs adj. effective, producing the desired result …

    English contemporary dictionary