1. the part of eyeglasses that rests on the bridge of the nose
2. the part of a microscope or similar optical instrument that holds the objective lenses
Usage: technical
3. the part of a helmet, mask, or breathing apparatus that covers or protects the nose

Examples

• The optician adjusted the nosepieces on my new glasses for a better fit.
• She cleaned the nosepieces of her reading glasses with a soft cloth.
• The microscope’s nosepieces can be rotated to change magnification levels.
• The laboratory technician switched between different objective lenses using the nosepieces.
• Medieval helmets often featured metal nosepieces for additional protection.
• The diving mask’s nosepieces allowed for easy equalization underwater.
• Plastic nosepieces are more comfortable than metal ones for extended wear.