See Also: aventail(dictionary)

aventail (iou)



aventail noun. Also aventayle. ME.
[Anglo-Norman = (see A-7) Old French esventail air-hole, from esventer (mod. eventer), ult. from Latin EX-1 + ventus wind: see -AL1.]
Hist. The movable front or mouthpiece of a helmet, which may be raised to admit air. Cf. VENTAIL 2.