(Noun) A row of balusters, surmounted by a rail or coping, forming an ornamental parapet or barrier along the edge of a terrace, balcony, etc.

In Context

“On the second floor rose three very high, curved windows, originally, he suspected, an open loggia but now glazed and fronted with a low stone balustrade.”

P. D. James, A Taste for Death, 1986.