cost-ef·fec·tive

[kawst-i-fek-tiv, kost-]
adjective
producing optimum results for the expenditure.

cost-ef·fec·tive·ly, adverb
cost-ef·fec·tive·ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
cost-effective
 
adj
providing adequate financial return in relation to outlay
 
cost-effectiveness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Cost-effective is always a great word to know.
So is callithumpian. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Example sentences
And it would drive space ship developers to create safe yet cost-effective
  vehicles.
Several pilot programs have found that doing so is a cost-effective way to
  reduce emissions.
Energy-efficient technologies are cost-effective now, but the market is set up
  to discourage efficiency.
Food and gas are so expensive it's more cost-effective to stay home and diet.
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