quadratojugal

From quadrato- +‎ jugal.

quadratojugal (not comparable)

1. (anatomy) Of or pertaining to the quadrate and jugal bones.
2. (anatomy) Of or pertaining to the quadratojugal bone.

• quadratojugular

quadratojugal (plural quadratojugals)

1. (anatomy) A small jaw bone found in the skull of most reptiles, amphibians and birds.
   • 1925, Samuel Wendell Williston, "Chapter 1" in The Osteology of the Reptiles

     The quadratojugals are relatively large in the primitive skull, sometimes forming a part of the articular surface for the mandible (Fig. 21 b). In the single-arched skull the quadratojugal tends to disappear. It is probably present in all Theromorpha, but is often confined chiefly to the posterior side of the quadrate

• “quadratojugal”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.