efficacious
Cross references: 1. effective ef.fi.ca.cious \.ef-*-'ka--sh*s\ aj [L efficac-, efficax, fr. efficere] : having the power to produce a desired effect - ef.fi.ca.cious.ly av
Cross references: 1. effective ef.fi.ca.cious \.ef-*-'ka--sh*s\ aj [L efficac-, efficax, fr. efficere] : having the power to produce a desired effect - ef.fi.ca.cious.ly av