vire

from The Collaborative International Dictionary of English v.0.48

Vire \Vire\, n. [OF. vire, fr. virer to turn. Cf. {Veer},
   {Vireton}.]
   An arrow, having a rotary motion, formerly used with the
   crossbow. Cf. {Vireton}. --Gower.
   [1913 Webster]