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regenerator

[ri-jen-uh-rey-ter] /rɪˈdʒɛn əˌreɪ tər/
noun
1.
a person or thing that regenerates.
2.
(in a regenerative furnace) a chamber filled with checkerwork that is repeatedly heated by exhaust gases in order to heat air that is passed through it.
Origin
1730-1740
1730-40; regenerate + -or2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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