Anatomical/medical term — the dense membrane wrapping every bone except joint surfaces.
骨膜炎 (gǔmóyán) = periostitis, a common runner's complaint (shin splints). The pattern '<organ>+
膜' gives many anatomical terms:
鼓膜 (gǔmó, eardrum, written differently),
角膜 (jiǎomó, cornea),
黏膜 (niánmó, mucous membrane).
