nosepiece

noun

1. Anything (originally a piece of armour) that protects the nose.

   “The big craze from this source [television] in 1966 was for a Batman outfit. This consisted of a large black cape, shaped cowl and pants with belt, with 'shimmering P.V.C. contrasting bat decorations'. So for 29s. 6d. a child was disguised and pictured himself flying over the treetops and in fact, with slit eyes and a nose-piece, a child did not look himself at all, and knew that his appearance was frightening.”

   “At impact, the nosepiece of Phelps’s goggles snapped.”

2. An animal's noseband.
3. The bridge between spectacle lenses that rests on the nose.
4. The part of a microscope that holds the objectives.
5. The outer end or point of a pipe, bellows, etc.