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economizer

[ih-kon-uh-mahy-zer]
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noun
  1. a person who economizes.
  2. (in a boiler) a device for warming feed water with gases entering the chimney or stack.
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Origin of economizer

First recorded in 1830–40; economize + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for economizer

economizer

economiser

noun
  1. a device that uses the waste heat from a boiler flue to preheat the feed water
  2. a person or thing that economizes
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012