Source : Webster's Revised Unabridged Dictionary (1913)

Ventail \Vent"ail\, n. [OF. ventaille, F. ventail. See
   {Ventilate}, and cf. {Aventail}.]
   That part of a helmet which is intended for the admission of
   air, -- sometimes in the visor. --Spenser.

         Her ventail up so high that he descried Her goodly
         visage and her beauty's pride.           --Fairfax.

Source : WordNet®

ventail
     n : a medieval hood of mail suspended from a basinet to protect
         the head and neck [syn: {camail}, {aventail}]