Source : Webster's Revised Unabridged Dictionary (1913)

Infrastapedial \In`fra*sta*pe"di*al\, a. [Infra + stapedial.]
   (Anat.)
   Of or pertaining to a part of the columella of the ear, which
   in many animals projects below the connection with the
   stapes. -- n. The infrastapedial part of the columella.