Efficience
Pronunciation : Ef*fi"cience, Ef*fi"cien*cy
Part of Speech : n.
Etymology : [L. efficientia.]
Definition : 1. The quality of being efficient or producing an effect or effects; efficient power; effectual agency. The manner of this divine efficiency being far above us. Hooker.
2. (Mech.)
Defn: The ratio of useful work to energy expended. Rankine. Efficiency of a heat engine, the ratio of the work done an engine, to the work due to the heat supplied to it.
Source : Webster's Unabridged Dictionary, 1913