[too
r-bil-yuhn] 
| 1. | a whirlwind or something resembling a whirlwind. |
| 2. | a firework that rises spirally. |
| 3. | Horology. a frame for the escapement of a timepiece, esp. 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. |
| tour·bil·lion (tŏŏr-bĭl'yən) n.
[Middle English turbilloun, from Old French torbeillon, ultimately from Latin turbō, from Greek turbē, noise, confusion; see turbid.] |