Sphenotic bone

from The Collaborative International Dictionary of English v.0.48

Sphenotic \Sphe*not"ic\, a. [Spheno- + ???, ???, the ear.]
   (Anat.)
   Of, pertaining to, or designating, the sphenotic bone.
   [1913 Webster]

   {Sphenotic bone} (Anat.), a bone on the anterior side of the
      auditory capsule of many fishes, and connected with, or
      adjoining, the sphenoid bone.
      [1913 Webster]