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ef-

1.
variant of ex-1. (by assimilation) before f: efficient.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Related Abbreviations for ef

EF

  1. efficiency (apartment)
  2. emission factor
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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5
5
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