This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A piece of armor that forms part of a helmet and protects the nose.

n. The part of a pair of eyeglasses that fits across the nose.

n. See noseband.

n. The part of a microscope, often rotatable, to which one or more objective lenses are attached.

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

n. The bridge between spectacle lenses that rests on the nose

n. The part of a microscope that holds the objectives

n. a strap that is the part of a bridle that goes over the animal's nose

n. the link between two lenses; rests on the nose

n. armor plate that protects the nose

"Then, with his other nostril pinched closed, he should insert the nosepiece gently into the nostril and aim the spray out and down the nasal passage (not toward the middle of his nose) and sniff gently."

strap    tie-in    tie    link    linkup