Ginglymodi :: Ginglymodi (n.) An order of ganoid fishes, including the modern gar pikes and many allied fossil forms. They have rhombic, ganoid scales, a heterocercal tail, paired fins without an axis, fulcra on the fins, and a bony skeleton, with the vertebrae convex in front and concave behind, forming a ball and socket joint. See Ganoidel..
Ginglymoidal :: Ginglymoidal (a.) Pertaining to, or resembling, a ginglymus, or hinge joint; ginglyform..
Ginglymus :: Ginglymus (n.) A hinge joint; an articulation, admitting of flexion and extension, or motion in two directions only, as the elbow and the ankle..