palatoquadrate

from The Century Dictionary.

• Of or pertaining to the palate and to the quadrate bone, or their representatives.
• See cut under Spatularia.
• noun In selachians, a cartilage or bone combining or representing both the palatal and the quadrate (as well as certain others which are differentiated in true fishes), and intervening between the cranium and the lower jaw, forming the suspensorium of the latter.

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

• noun biology The dorsal part of the mandibular arch in some fish