ef·fec·tu·al 
(ĭ-fĕkch-əl)
(ĭ-fĕkch-əl)adj.
Producing or sufficient to produce a desired effect. See Synonyms at effective.
[Middle English effectuel, from Old French, from Late Latin effectuālis, from Latin effectus, result, effect; see EFFECT.]
ef·fec′tu·ali·ty (-ălĭ-tē) n.
ef·fectu·al·ly adv.