Isocephalism

I′so‐ceph″a‐lism (?), n. [From Gr. � like-headed. See Iso-, and Cephalon.] (Art) A peculiarity in the design of bas-relief by which the heads of human figures are kept at the same height from the ground, whether the personages are seated, standing, or mounted on horseback; — called also isokephaleia.