Also found in: Thesaurus.
Related to ventail: hauberk
1. The movable part of the front of a medieval helmet, fitting over the nose and mouth; the upper beaver.
2. A removable flap of mail worn across the mouth and chin.
(Arms & Armour (excluding Firearms)) (in medieval armour) a covering for the lower part of the face
[C14: from Old French ventaille sluice, from vent wind, from Latin ventus]
a movable part on the lower front of a medieval helmet.