Ef*fi"cience (?), Ef*fi"cien*cy (?), n. [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.

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.

 

© Webster 1913.

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