Noah Webster's 1828 American Dictionary of the English Language is regarded by many as the finest English
dictionary ever published. The dictionary is available in many forms. I made the content available here for my own purposes,
out of personal admiration for this particular dictionary.
EFFI'CIENCE EFFI'CIENCY, n. [L. efficiens, from efficio. See Effect.] 1. The act of producing effects; a causing to be or exist; effectual agency. The manner of this divine efficiency is far above us. Gravity does not proceed from the efficiency of any contingent or unstable agent. 2. Power of producing the effect intended; active competent power.
efficience appears in definitions for these words: