tour billion


a whirlwind or something resembling a whirlwind.
a firework that rises spirally.
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.

1470–80; earlier turbilloun < Middle French to(u)rbillon < Vulgar Latin *turbiliōnem, dissimilated variant of *turbiniōnem, accusative of *turbiniō whirlwind. See turbine, -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tourbillion (tʊəˈbɪljən)
a rare word for whirlwind
[C15: from French tourbillon, ultimately from Latin turbō something that spins, from turbāre to confuse]

Collins English Dictionary - Complete & Unabridged 10th Edition
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