%bossage%

n. [ F. bossage, fr. bosse. See Boss a stud. ] 1. (Arch.) A stone in a building, left rough and projecting, to be afterward carved into shape. Gwilt. [ 1913 Webster ]

2. (Arch.) Rustic work, consisting of stones which seem to advance beyond the level of the building, by reason of indentures or channels left in the joinings. Gwilt. [ 1913 Webster ]