The Collaborative International Dictionary of English v.0.48:

Umbrere \Um*brere\, Umbriere \Um*briere\, n. [F. ombre a shade,
   L. umbra; cf. F. ombrelle a sunshade, OF. also ombri[`e]re.
   See Umbrella.]
   In ancient armor, a visor, or projection like the peak of a
   cap, to which a face guard was sometimes attached. This was
   sometimes fixed, and sometimes moved freely upon the helmet
   and could be raised like the beaver. Called also umber, and
   umbril. [Obs.]
   [1913 Webster]

         But only vented up her umbriere.         --Spenser.
   [1913 Webster]