砧骨襞
Fossa incudis
定义
砧骨襞（fossa incudis）是位于上鼓室隐窝下后部的一个小下降；其内容纳砧骨短小腿。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
