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energize
energy
energy audit
energy balance
energy band
energy-band theory
energy bar
energy crisis
energy efficient
energy field
energy level
energy recovery
energy tax
energy therapy
enervate
enervated
enervating
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energy efficient
en·er·gy ef·fi·cient


adjective 
Definition:
 
economical: using electrical or other energy in an economical way ( hyphenated when used before a noun )

Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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