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autotransformer

[aw-toh-trans-fawr-mer] /ˌɔ toʊ trænsˈfɔr mər/
noun, Electricity.
1.
a transformer having a single coil that serves as both a primary coil and a secondary coil.
Origin of autotransformer
1890-1895
First recorded in 1890-95; auto-1 + transformer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for autotransformer

autotransformer

/ˌɔːtəʊtrænsˈfɔːmə/
noun
1.
a transformer in which part of the winding is common to both primary and secondary circuits
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
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