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