effectual

adj 1: sufficient to produce a result; "a man to whom painting was

but another and less effectual way of writing dramas

or novels or history" [ant: {ineffectual}]

2: producing or capable of producing an intended result or

having a striking effect; "an air-cooled motor was more

effective than a witch's broomstick for rapid

long-distance transportation"-LewisMumford; "effective

teaching methods"; "effective steps toward peace"; "made

an effective entrance"; "his complaint proved to be

effectual in bringing action"; "an efficacious law" [syn:

{effective}, {efficacious}] [ant: {ineffective}]

3: exerting or capable of exerting strong physiological or

chemical effects; "an effectual vaccine"