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efficiency (n.)
1590s, "power to accomplish something," from Latin efficientia "efficient power; efficiency; influence" (from efficientem; see efficient) + -cy. In mechanics, "ratio of useful work done to energy expended," from 1858. Attested by 1951 as short for efficiency apartment (itself from 1917).
updated on December 31, 2019
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Definitions of efficiency from WordNet
Dictionary entries near efficiency
effervescence
effervescent
effete
efficacious
efficacy
efficiency
efficient
effigy
effleurage
effloresce
efflorescence