aventail

/AA0 V EY0 N T EY0 L/
noun
  1. 1

    A curtain or flap of mail, fastened to a helmet, or to a coif (hood) of mail, covering the lower face, neck, and shoulders.

  2. 2

    Synonym of ventail (โ€œmovable (solid plate) front to a helmetโ€).