Originally, a boundary stone dedicated to Hermes as the god
   of boundaries, and therefore bearing in some cases a head, or head and
   shoulders, placed upon a quadrangular pillar whose height is that of
   the body belonging to the head, sometimes having feet or other parts of
   the body sculptured upon it. These figures, though often representing
   Hermes, were used for other divinities, and even, in later times, for
   portraits of human beings. Called also herma. See Terminal statue,
   under Terminal.