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tourbillion

[too r-bil-yuh n] /tʊərˈbɪl yən/
noun
1.
a whirlwind or something resembling a whirlwind.
2.
a firework that rises spirally.
3.
Horology. a frame for the escapement of a timepiece, especially a watch, geared to the going train in such a way as to rotate the escapement about once a minute in order to minimize positional error.
Compare karrusel.
Origin
1470-1480
1470-80; earlier turbilloun < Middle French to(u)rbillon < Vulgar Latin *turbiliōnem, dissimilated variant of *turbiniōnem, accusative of *turbiniō whirlwind. See turbine, -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tourbillion

tourbillion

/tʊəˈbɪljən/
noun
1.
a rare word for whirlwind
Word Origin
C15: from French tourbillon, ultimately from Latin turbō something that spins, from turbāre to confuse
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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