also: とうこつ
stapes; stirrup bone
Anatomical term for the smallest bone in the human body, located in the middle ear.
The stapes is one of the auditory ossicles and transmits sound to the inner ear.
Standard modern spelling using katakana for あぶみ and kanji for 骨.
Hiragana variant; less common but still used.
Full kanji spelling; rare and may be read とうこつ by some.
Alternate reading for the full kanji form; very rare.
From 鐙 (あぶみ, 'stirrup') + 骨 (こつ, 'bone'), referring to the stirrup-like shape of the bone. The katakana spelling アブミ骨 is common in modern medical contexts.