ceratobranchial

from The Collaborative International Dictionary of English v.0.48

Ceratobranchial \Cer`a*to*bran"chi*al\, a. (Anat.)
   Pertaining to the bone, or cartilage, below the epibranchial
   in a branchial arch. -- n. A ceratobranchial bone, or
   cartilage.
   [1913 Webster]