Balustrade

Webster's Dictionary

(n.) A row of balusters topped by a rail, serving as an open parapet, as along the edge of a balcony, terrace, bridge, staircase, or the eaves of a building.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

is a range of small balusters supporting a coping or cornice, and forming a parapet or enclosure. Balustrum, a name sometimes applied to the chancel- rails, or cancelli (q.v.)