glossohyal

from The Century Dictionary.

• noun In ichthyology, the bone of the tongue.
• Pertaining to the tongue and the hyoid bone; hyoglos-sal: thus, the hyoglossus is a glossohyal muscle.
• noun In ornithology, a bone or cartilage situated in front of the basihyal, and constituting the hard basis of the tongue; a, median unpaired element of the hyoidean arch.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Anat.) Pertaining to both the hyoidean arch and the tongue; -- applied to the anterior segment of the hyoidean arch in many fishes. -- n. The glossohyal bone or cartilage; lingual bone; entoglossal bone.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The tongue bone, specifically the lingual plate, which is a dermal toothed bone that covers or fuses with the basihyal.