The Collaborative International Dictionary
Interstapedial
Interstapedial \In`ter*sta*pe"di*al\, a. (Anat.) Pertaining to a part of the columella of the ear, between the stapes and the mediostapedial. -- n. The interstapedial part of the columella.
Wiktionary
interstapedial
a. (context anatomy English) Relating to part of the columella of the ear, between the stapes and the mediostapedial.