A part
鏡
Shown as a part of 1 word so far, read one way.
きょう 1 word
- 望遠鏡ぼうえんきょうtelescope
望遠鏡 · here “lens”
Also written with 鏡
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.