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.
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
But only vented up her umbriere. --Spenser.