VISOR
bill, peak, eyeshade, visor, vizor
(noun) a brim that projects to the front to shade the eyes; “he pulled down the bill of his cap and trudged ahead”
visor, vizor
(noun) a piece of armor plate (with eye slits) fixed or hinged to a medieval helmet to protect the face
Source: WordNet® 3.1
Etymology
Noun
visor (plural visors)
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.
A mask for the face.
The fore piece of a cap, projecting over, and protecting the eyes.
Proper noun
ViSOR
(UK, legal) Initialism of Violent and Sexual Offenders Register.
Source: Wiktionary
Vis"or, n. Etym: [OE. visere, F. visière, fr. OF. vis. See Visage,
Vision.] [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." Shak.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition