noun, noun or participle which takes 'suru', transitive verb
bone fracture; broken bone
Medical and everyday term for a broken bone. Used as a noun or with する to mean 'to break a bone'.
転んで腕を骨折した。
I fell and broke my arm.
骨折の治療には時間がかかる。
Treatment for a bone fracture takes time.
Compound of 骨 (bone) and 折 (break, fold). The reading こっせつ is a regular on'yomi combination with gemination (促音便) of こつ.