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expander

[ik-span-der] /ɪkˈspæn dər/
noun
1.
a person or thing that expands.
2.
Also, expandor. Electronics. a transducer that produces an output with a range of voltages greater than that of the input signal.
Compare compressor (def 5).
Origin
1860-1865
1860-65; expand + -er1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for expander

expander

/ɪkˈspændə/
noun
1.
a device for exercising and developing the muscles of the body a chest expander
2.
an electronic device for increasing the variations in signal amplitude in a transmission system according to a specified law Compare compressor (sense 5), compander
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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