nosepiece

plural nosepieces

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

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

   2009 August 2, Karen Crouse, “Phelps Grabs Record in 100 Butterfly”, in New York Times

   1 more example

   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.

   1971, Gwen White, Antique Toys And Their Background, page 186

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.