Main Entry:

tour·bil·lion

Pronunciation:

\tu̇r-ˈbil-yən\

Variant(s):

or tour·bil·lon \tür-bē-yōⁿ\

Function:

noun

Etymology:

Anglo-French turbeillun, ultimately from Latin turbin-, turbo — more at turbine

Date:

15th century

1 : whirlwind 1 2 : a vortex especially of a whirlwind or whirlpool