Webster’s Revised Unabridged Dictionary · 1913
Ginglymus
Gin′gly·mus (jĭn′glĭ·mŭs), n.; pl. Ginglymi (#). [NL., fr. Gr. ? a hingelike joint, a ball and socket joint.] (Anat.) A hinge joint; an articulation, admitting of flexion and extension, or motion in two directions only, as the elbow and the ankle.