noun
nasal septum; bridge of the nose
Anatomical term referring to the partition between the nostrils (nasal septum) or the bony upper part of the nose (bridge). Context usually clarifies which part is meant.
鼻柱が曲がっていると呼吸がしづらいことがある。
If the nasal septum is deviated, breathing can be difficult.
彼は鼻柱の高い顔立ちをしている。
He has facial features with a high bridge of the nose.
Compound of 鼻 (nose) and 柱 (pillar, column), referring to the central structural part of the nose. The exact historical derivation is uncertain.