quadratojugal

== English == === Etymology === From quadrato- + jugal. === Adjective === quadratojugal (not comparable) (anatomy) Of or pertaining to the quadrate and jugal bones. (anatomy) Of or pertaining to the quadratojugal bone. ==== Related terms ==== quadratojugular === Noun === quadratojugal (plural quadratojugals) (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 === References === “quadratojugal”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.