• (n.) The surangular bone. • (a.) Above the angular bone; supra-angular; -- applied to a bone of the lower jaw in many reptiles and birds.
Sur·an'gu·lar adjective [ Prefix sur- + angular .] (Anat.) Above the angular bone; supra- angular; -- applied to a bone of the lower jaw in many reptiles and birds. -- noun The surangular bone.