xiphoid process; xiphoid cartilage
Anatomical term for the small cartilaginous extension at the lower end of the sternum.
The xiphoid process is a small cartilage at the lower end of the sternum.
胸骨 is the sternum (breastbone) as a whole; 剣状軟骨 is specifically the xiphoid process at its tip.
From 剣状 (sword-shaped) + 軟骨 (cartilage), describing its pointed shape.