The Collaborative International Dictionary of English v.0.48:

Pirouette \Pir`ou*ette"\, v. i. [imp. & p. p. Pirouetted; p.
   pr. & vb. n. Pirouetting.] [F. pirouetter.]
   To perform a pirouette; to whirl, like a dancer.
   [1913 Webster] Pirry