noun
nasal plug; nose plug
A plug or stopper for the nose, used for swimming, medical purposes, or to block smells.
水泳のときに鼻栓を使う人もいる。
Some people use a nose plug when swimming.
noun
wedge; wooden pin (in tusk tenon joint)
Architectural term: a wedge or wooden pin driven through a tenon in a tusk mortise-and-tenon joint to secure it.
この伝統的な建具では、鼻栓でほぞを固定している。
In this traditional joinery, the tenon is secured with a wedge (鼻栓).