EFFICIENCE
Noun
efficience (countable and uncountable, plural efficiences)
Archaic form of efficiency.
Source: Wiktionary
Ef*fi"cience, Ef*fi"cien*cy, n. Etym: [L. efficientia.]
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.)
Definition: 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 Edition