vi·sor /ˈvaɪzɚ/
  面頰,帽舌,盔甲
  Vis·or n.  [Written also visar, visard, vizard, and vizor.]
  1. A part of a helmet, arranged so as to lift or open, and so show the face. The openings for seeing and breathing are generally in it.
  2. A mask used to disfigure or disguise.  “My very visor began to assume life.”
     My weaker government since, makes you pull off the visor.   --Sir P. Sidney.
  3. The fore piece of a cap, projecting over, and protecting the eyes.
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  visor
       n 1: a piece of armor plate (with eye slits) fixed or hinged to a
            medieval helmet to protect the face [syn: vizor]
       2: a brim that projects to the front to shade the eyes; "he
          pulled down the bill of his cap and trudged ahead" [syn: bill,
           peak, eyeshade, vizor]