輪状靭帯（アブミ骨）（ りんじょうじんたい、英：annular ligament ）
The annular stapedial ligament (also called the stapediovestibular joint) is a ring of fibrous soft tissue that connects the base of the stapes to the oval window of the inner ear. Calcification and hardening of the annular ligament of the stapes (Otosclerosis) is a common cause of adult deafness.
【 語 句 】
・base of the stapes：アブミ骨底 ・oval window：前庭窓 ・inner ear：内耳 ・calcification：石灰化 ・Otosclerosis：耳硬化症