noun, noun or participle which takes 'suru', intransitive verb
protuberance; projection; bump
Refers to a part that sticks out from a surface; used in anatomy, engineering, and general description. The する verb form means 'to protrude' or 'to project'.
この部品には小さな突起がある。
This part has a small protrusion.
骨
A projection forms on the surface of the bone.