noun
bridge of the nose
Anatomical term for the bony upper part of the nose between the eyes.
彼は鼻筋の通った顔立ちをしている。
He has a well-defined nose bridge.
メガネが鼻筋に当たって痛い。
My glasses hurt where they rest on the bridge of my nose.
鼻 is the general word for 'nose'; 鼻筋 specifically refers to the bridge.
Compound of 鼻 (nose) and 筋 (line, muscle, sinew), literally 'nose line'.