n.1.(Masonry) A large stone reaching through a wall so as to appear on both sides of it, and acting as a binder; - called also perbend, perpend stone, and perpent stone.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Loefke, Comment, The Pert Perpender: Associate Judge Eugene F.