A half pier or pillar attached to a wall to support an arch.
Half pillar or half pier attached to the wall to support an arch. (Wood, Margaret. The English Medieval House, 414)
A half pillar attached to and projecting from a wall, used to carry one end of an arch
Half-pier bonded into a wall to carry an arch.
An engaged column, pilaster, or similar structure that either projects from a compound pier or some other supporting device or is bonded to a wall and carries one end of an arch, often at the end of an arcade. A nave arcade, for example, may have nine pillars and two responds. Vertical wall elements in perpendicular style architecture.
Half pillar at the end of an arcade built aginst a wall