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switchblade

[swich-bleyd] /ˈswɪtʃˌbleɪd/
noun
1.
a pocketknife, the blade of which is held by a spring and can be released suddenly, as by pressing a button.
Also called switchblade knife, switch knife.
Origin
1905-1910
1905-10; switch + blade
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for switch blade knife

switchblade

/ˈswɪtʃˌbleɪd/
noun
1.
(US & Canadian) a knife with a retractable blade that springs out when a button is pressed
Also called (in Britain and certain other countries) flick knife
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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Word Origin and History for switch blade knife

switchblade

n.

also switch-blade, type of folding pocket knife, 1932, from switch (n.) + blade. So called for the "switch" which is pressed to spring the knife open. Earlier a similar tool was known as an Arkansas toothpick (1837) and a clasp-knife (1755).

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for switch

14
14
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