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self-winding

[self-wahyn-ding]
adjective (of a timepiece)
  1. kept wound or wound periodically by a mechanism, as an electric motor or a system of weighted levers, so that winding by hand is not necessary.
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Origin of self-winding

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for self-winding

self-winding

adjective
  1. (of a wrist watch) having a mechanism, activated by the movements of the wearer, in which a rotating or oscillating weight rewinds the mainspring
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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